Toyota CH-R Service Manual: Diagnosis System

DIAGNOSIS SYSTEM

CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION

(a) The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

(1) Techstream display and installed systems

HINT:

The names of ECUs and sensors shown on the Techstream display may differ from those shown in DTC Table by ECU.

Connected to

Code

ECU/Sensor Name

Techstream Display

Applicability

-

CGW

Central gateway ECU (network gateway ECU)

-

Installed on all vehicles

-

DLC3

DLC3

-

Installed on all vehicles

Bus 1

BSM

Blind spot monitor sensor LH

Blind Spot Monitor Master

Vehicles with Blind Spot Monitor System

F-CAM

Forward recognition camera

Front Camera Module

Vehicles with Toyota Safety Sense P

F-MR

Millimeter wave radar sensor assembly

Front Radar

Vehicles with Toyota Safety Sense P

Bus 2

ENG

ECM

ECM (Engine)

Installed on all vehicles

Bus 3

AV

Radio and display receiver assembly

Display and Navigation (AVN)

Vehicles with Radio and Display Type

DCM

DCM (Telematics transceiver)

DCM

Vehicles with Telematics Transceiver

Bus 4

STR

Steering sensor

Spiral cable (Steering Angle Sensor)

Installed on all vehicles

EPS

Power steering ECU assembly

Power Steering (EPS)

Installed on all vehicles

BRK

Brake actuator assembly

Skid Control (ABS/VSC/TRAC)

Installed on all vehicles

OCS

Occupant detection ECU

Occupant Detection

Vehicles with Occupant Detection ECU

SRS

Airbag sensor assembly

Airbag

Installed on all vehicles

Bus 5

A/C

Air conditioning amplifier assembly

Air Conditioning Amplifier

Installed on all vehicles

SMT

Certification ECU (smart key ECU assembly)

Certification (Smart)

Vehicles with Smart Key System

MB

Main body ECU (multiplex network body ECU)

Main Body

Installed on all vehicles

MET

Combination meter assembly

Combination Meter

Installed on all vehicles

LIT

Headlight ECU sub-assembly LH

Headlight swivel (AFS)

Vehicles with LED Headlight

NOTICE:

The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

Description of "Communication Bus Check" Screen

HINT:

The ECUs and sensors that are normally connected to the CAN communication system are displayed on the Techstream.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

HINT:

If items are not selected correctly in the vehicle specification pop up screen, the name of the CAN junction connector to which the ECUs or sensors are connected may not be displayed on the "Communication Bus Check" screen.

(b) Confirm that the "Communication Bus Check" screen is displayed and the ECUs and sensors that are normally connected to the CAN communication system are displayed.

HINT:

  • Even if an ECU or sensor that is connected to a bus that is monitored by a bus monitoring ECU (gateway function equipped ECU) is not communicating, it will remain displayed on the "Communication Bus Check" screen.
  • When an ECU or sensor that is connected to a bus that is not monitored by a bus monitoring ECU (gateway function equipped ECU) is not displayed on the "Communication Bus Check" screen, it means that it is not communicating.

(c) The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

*a

Combo box

*b

Background color is red or yellow

Item

Detail

Combo box: ALL

Displays all ECUs and sensors connected to the central bus and sub buses.

Combo box: Bus

Displays ECUs and sensors connected to the selected bus.

Combo box: Sub bus

Displays ECUs and sensors connected to the selected sub bus.

Combo box: Central Gateway

Displays all ECUs and sensors connected to the central bus.

NOTICE:

  • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
  • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose the CAN communication system, refer to System Diagram.

    Click here

HINT:

The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

Description of "Communication Bus Check" Screen

Bus Type

Background Color

Connection Status

Bus

White

Communication has been normal.

Yellow

Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).

Red

Currently not communicating (either of the following):

  • Not communicating since the start of the CAN bus check
  • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.

Not displayed

Either of the following:

  • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.*4
  • No ECUs or sensors are connected to the bus.*5

Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2

White

Communication has been normal since the start of the CAN bus check.

Yellow

Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).

Red

Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.

Not displayed

Communication stop has continued since the start of the CAN bus check.*1

Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3

White

Communication has been normal.

Yellow

Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).

Red

Currently not communicating (either of the following):

  • Not communicating since the start of the CAN bus check
  • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.

Not displayed

Either of the following:

  • The gateway function equipped ECU cannot communicate with the central gateway ECU.*6
  • No ECUs or sensors are connected to the sub bus.*7
  • Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.
  • *1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.
  • *2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.
  • *3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.
  • *4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
  • *5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
  • *6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
  • *7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.
  • If there is no communication between the Techstream and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

(d) Monitor the screen for any ECU or sensor connection status changes for a period of 2 minutes.

HINT:

  • If an open occurs in one of the wires of a CAN branch line, it may interfere with the communication of other ECUs or sensors resulting in an incorrect state being displayed.
  • If the connection status changes intermittently during the inspection, repair the open in the branch line of the ECU or sensor that is not communicating, and then perform Communication Bus Check again.

NOTICE:

The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

Description of "Communication Bus Check (Detail)" Screen

HINT:

The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

HINT:

If items are not selected correctly in the vehicle specification pop up screen, the name of the CAN junction connector to which the ECUs or sensors are connected may not be displayed on the "Communication Bus Check" screen.

(b) Select "Detail" on the "Communication Bus Check" screen.

*a

Communication Bus Check (Detail)

-

-

(c) Confirm that the "Communication Bus Check (Detail)" screen is displayed and the communication error history of the ECUs or sensors up to present is displayed.

HINT:

  • Lost Communication Time and Lost Communication Trip are only displayed for the central bus.
  • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

(d) The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

*a

Combo box

*b

Background color is red

Item

Detail

Combo box: ALL

Displays all ECUs and sensors connected to the central bus and sub buses.

Combo box: Bus

Displays ECUs and sensors connected to the selected bus.

Combo box: Sub bus

Displays ECUs and sensors connected to the selected sub bus.

Combo box: Central Gateway

Displays all ECUs and sensors connected to the central bus.

Bus Monitoring ECU

Displays the gateway function equipped ECU which monitors the selected bus or sub bus.

Current Trip

Displays the total number of trips up to now*

Lost Communication Time(s)

Displays the longest period of time in seconds that the ECU or sensor connected to the central bus was not communicating.

Lost Communication Trip

Displays the trip in which the longest period of time that the ECU or sensor connected to the central bus was not communicating occurred.

  • *: If the component has been replaced with a new one, the total number of trips after the replacement is displayed.

NOTICE:

  • The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.
  • The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.
  • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
  • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.

    Click here

HINT:

The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

Description of "Communication Bus Check (Detail)" Screen

Bus Type

Background Color

Connection Status

Bus

White

Either of the following:

  • Communication has been normal.
  • Lost Communication Time is below 6 seconds.

Red

Lost Communication Time is 6 seconds or more.

Not displayed

Either of the following:

  • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.*1
  • No ECUs or sensors are connected to the bus.*2

Sub bus

White

Lost Communication Time is displayed as "-".

Not displayed

Either of the following:

  • The gateway function equipped ECU cannot communicate with the central gateway ECU.*3
  • No ECUs or sensors are connected to the sub bus.*4
  • If there is no communication between the Techstream and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.
  • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.
  • *1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
  • *2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
  • *3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
  • *4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

Communication Bus Check (Communication Malfunction Check)

HINT:

DTCs related to CAN communication are displayed for each ECU on the Techstream.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

(b) Select "Communication Malfunction Check" on the "Communication Bus Check" screen.

*a

Communication Malfunction Check

-

-

(c) Confirm that the "Communication Malfunction Check" screen is displayed and CAN communication DTCs for each ECU are displayed.

HINT:

When there are no CAN communication DTCs stored, no DTCs will be displayed.

How to Use "Communication Bus Check" Screen in Inspection

NOTICE:

The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.

HINT:

  • If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication DTCs for determining the suspected area.
  • Turn the ignition switch to ON, or perform the necessary operations to reproduce the problem symptom, select "Communication Bus Check" and wait approximately 2 minutes. Check the communication status of each ECU or sensor on the screen while performing this operation.

(a) If the CAN communication system is currently malfunctioning, determine the suspected area through Communication Bus Check as follows:

Problem Symptoms Table

Problem Symptom Pattern

Display on Communication Bus Check Screen

Suspected Area

A

Almost all of the ECUs and sensors connected to the malfunctioning CAN bus are displayed as not communicating on the "Communication Bus Check" screen.

  • Short between CAN bus lines (CANH and CANL)
  • Short to +B in a CAN bus line (CANH or CANL)
  • Short to ground in a CAN bus line (CANH or CANL)

B

ECUs or sensors farther from the central gateway ECU (network gateway ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen.

Open in both wires of a main bus line in the central bus

C

One ECU or sensor is displayed as not communicating on the "Communication Bus Check" screen.

  • Open in both wires of a branch line connected to an ECU or sensor in the central bus
  • Internal malfunction of an ECU or sensor in the central bus
  • Malfunction in the power supplied to an ECU or sensor in the central bus

D

No ECUs or sensors are displayed on the "Communication Bus Check" screen.

  • Internal malfunction of the central gateway ECU (network gateway ECU)
  • Malfunction in the power supplied to the central gateway ECU (network gateway ECU)
  • Open in both wires of the branch line in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))
  • Short between CAN bus lines (CANH and CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))
  • Short to +B in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))
  • Short to ground in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))

E

One ECU or sensor is displayed as not communicating in multiple buses on the "Communication Bus Check" screen.

  • Internal malfunction of an ECU or sensor connected to multiple buses
  • Malfunction in the power supplied to an ECU or sensor connected to multiple buses

F

Some ECUs or sensors are displayed as not communicating in the central bus and other ECUs or sensors are displayed as not communicating in a sub bus.

  • Open in a wire of a branch line connected to an ECU or sensor in the central bus
  • Internal malfunction of an ECU or sensor in the central bus

G

A gateway function equipped ECU is displayed as not communicating in the central bus and ECUs and sensors connected to its respective sub bus are not displayed.

  • Open in both wires of a branch line connected to a gateway function equipped ECU
  • Internal malfunction of a gateway function equipped ECU
  • Malfunction in the power supplied to a gateway function equipped ECU

H

One ECU or sensor is displayed as not communicating in a sub bus on the "Communication Bus Check" screen.

  • Open in both wires of a branch line connected to an ECU or sensor in a sub bus
  • Internal malfunction of an ECU or sensor in a sub bus
  • Malfunction in the power supplied to an ECU or sensor in a sub bus

I

ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen.

Open in both wires of a main bus line in a sub bus

(b) Problem Symptom Pattern A

Details of Malfunction

  • Short between CAN bus lines (CANH and CANL) in Bus 2
  • Short to +B in a CAN bus line (CANH or CANL) in Bus 2
  • Short to ground in a CAN bus line (CANH or CANL) in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.
  • The malfunction in Bus 2 will not affect the other buses.
  • The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.
  • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

  • Short between CAN bus lines (CANH and CANL) in Bus 4
  • Short to +B in a CAN bus line (CANH or CANL) in Bus 4
  • Short to ground in a CAN bus line (CANH or CANL) in Bus 4

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

*g

Not displayed

-

-

HINT:

  • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 4 will be displayed as not communicating and their background color will be red.
  • The malfunction will not affect the other buses of the central bus. However, the sub bus connected to Bus 4 is likely to be affected. The gateway function equipped ECU connected to Bus 4 will not communicate and consequently the sub bus and its respective ECUs or sensors monitored by the gateway function equipped ECU (sub bus monitoring ECU) will not be displayed, indicating that the gateway function equipped ECU is not communicating with the central gateway ECU (network gateway ECU).
  • The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.
  • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

(c) Problem Symptom Pattern B

Details of Malfunction

Open in both wires of the main bus line between the CGW and No. 1 CAN junction connector in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.
  • The malfunction in Bus 2 will not affect the other buses.
  • The malfunctioning part can be determined by inspecting for an open in the main bus line.
  • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Open in both wires of the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • Due to the malfunction, ECUs or sensors farther from the CGW than the open in the wires will be displayed as not communicating and their background color will be red.
  • The malfunction in Bus 2 will not affect the other buses.
  • The malfunctioning part can be determined by inspecting for an open in the main bus line.
  • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Open in both wires of the main bus line between the No. 2 CAN junction connector and ENG in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

*g

Pattern 1

*h

Pattern 2

HINT:

  • Even when the same part of the main bus line is open, depending on internal electrical noise which changes according to the position of the open in the line, the information displayed on the "Communication Bus Check" screen may differ.
  • In pattern 2, the information displayed may be the same as when there is an open in both wires in the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector, which may make it difficult to determine the malfunctioning part.
  • The malfunction in Bus 2 will not affect the other buses.
  • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

(d) Problem Symptom Pattern C

Details of Malfunction

Open in both wires of the branch line connected to F-MGC in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor. In this example, the background color of the malfunctioning ECU or sensor will be red.

Details of Malfunction

  • Internal malfunction of F-MGC in Bus 2
  • Malfunction in the power supplied to F-MGC in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor. In this example, the background color of the malfunctioning ECU or sensor will be red.

Details of Malfunction

Open in both wires of the branch line connected to ENG in Bus 4

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • The malfunction in Bus 4 will not affect the other buses.
  • Due to the malfunction, although ENG is communicating normally with CGW via Bus 2, it is not communicating with CGW via Bus 4. Consequently, it will be displayed as not communicating in Bus 4.

(e) Problem Symptom Pattern D

Details of Malfunction

  • Internal malfunction of the CGW
  • Malfunction in the power supplied to the CGW

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Not displayed

HINT:

When there is no communication between the Techstream and the vehicle, no ECUs or sensors will be displayed.

Details of Malfunction

Open in both wires of the branch lines in the diagnosis bus

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Not displayed

HINT:

When there is no communication between the Techstream and the vehicle, no ECUs or sensors will be displayed.

(f) Problem Symptom Pattern E

Details of Malfunction

  • Internal malfunction of BRK
  • Malfunction in the power supplied to BRK

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

The information displayed on the "Communication Bus Check" screen will be the same for an internal malfunction of an ECU or sensor, or a malfunction in the power supplied to an ECU or sensor.

Due to the malfunction, BRK is not communicating with the CGW via both Bus 2 and Bus 4. Consequently, the background color of BRK will be red for both Bus 2 and Bus 4.

(g) Problem Symptom Pattern F

Details of Malfunction

  • Open in a wire of the branch line connected to HV in Bus 4
  • Internal malfunction of HV in Bus 4

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

*g

Background color intermittently becomes yellow or red

*h

Not displayed or background color is yellow or red

HINT:

  • In the "Communication Bus check" screen shown in the illustration, electrical noise in the CAN bus caused by an open in a wire in the branch line connected to HV interferes with the communication of MB causing unstable communication. Also, since MB is a gateway function equipped ECU, communication of ECUs connected to its respective sub bus will also be unstable.
  • In the "Communication Bus Check" screen shown in the illustration, because the background color of HV is red, it is suspected that HV is the most likely cause of the malfunction. Therefore, it is suspected that HV is not communicating.

(h) Problem Symptom Pattern G

Details of Malfunction

  • Open in both wires of the branch line connected to MB in Bus 4
  • Internal malfunction of MB in Bus 4
  • Malfunction in the power supplied to MB in Bus 4

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

*g

Not displayed

-

-

HINT:

  • If there is a communication malfunction in a gateway function equipped ECU, ECUs connected to its respective sub bus will also be affected and will not be displayed.
  • In the "Communication Bus Check" screen shown in the illustration, MB is a gateway function equipped ECU. Therefore, MB is suspected as not communicating.

(i) Problem Symptoms Pattern H

Details of Malfunction

  • Internal malfunction of MIR-L in the sub bus
  • Malfunction in the power supplied to MIR-L in the sub bus

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • The malfunction in the sub bus will not affect the other buses.
  • When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.
  • The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

Details of Malfunction

Open in both wires of the branch line connected to MIR-L in the sub bus

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

  • The malfunction in the sub bus will not affect the other buses.
  • When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.
  • The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

(j) Problem Symptom Pattern I

Details of Malfunction

Open in both wires of the main bus line in the sub bus

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

HINT:

Due to the malfunction, ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires will be displayed as not communicating and their background color will be red.

How to Use "Communication Bus check (Detail)" Screen in Inspection

(a) If the CAN communication system is currently normal but has communication stop history, determine the malfunctioning part using Communication Bus Check (Detail) as follows:

NOTICE:

  • The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.
  • The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.
  • The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.
  • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
  • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.

    Click here

HINT:

  • If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.
  • The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.
  • Lost Communication Time and Lost Communication Trip are only displayed for the central bus.
  • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

(b) If there is an ECU or sensor displayed with a red background on the "Communication Bus Check (Detail)" screen to indicate that it was not communicating, it is suspected that the ECU or sensor was not communicating.

Details of Malfunction

Past malfunction in the wire harness or power supplied to F-MGC in Bus 2

*a

Bus 2

*b

Bus 4

*c

Sub bus

*d

Diagnosis bus

*e

Location of malfunction

*f

Background color is red

Description of "Communication Bus Check (Detail)" Screen

Bus Type

Background Color

Connection Status

Bus

White

Either of the following:

  • Communication has been normal.
  • Lost Communication Time is below 6 seconds.

Red

Lost Communication Time is 6 seconds or more.

Not displayed

Either of the following:

  • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.*1
  • No ECUs or sensors are connected to the bus.*2

Sub bus

White

Lost Communication Time is displayed as "-".

Not displayed

Either of the following:

  • The gateway function equipped ECU cannot communicate with the central gateway ECU.*3
  • No ECUs or sensors are connected to the sub bus.*4

HINT:

  • Check the values of Lost Communication Trip and Current Trip for the ECUs or sensors that have a red background color.
  • If the values of Lost Communication Trip and Current Trip are the same for an ECU or sensor, the ECU or sensor is currently not communicating. In this case, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.
  • In the "Communication Bus Check (Detail)" screen shown in the illustration, F-MGC had a communication malfunction in the 10th trip. Thus, it is suspected that F-MGC was not communicating.
  • *1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
  • *2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
  • *3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
  • *4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

DTC TABLE BY ECU

HINT:

  • In the CAN communication system, the CAN communication DTCs of each ECU can be displayed using the Techstream.
  • If CAN communication system DTCs are output, the malfunction cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting.

    Click here

  • If there is a malfunction currently, DTCs can be checked by performing steps in the DTC check procedure.

(a) ECM / Techstream Display "Engine and ECT"

Powertrain > Engine and ECT > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to SFI System.

    w/ Canister Pump Module: Click here

    w/o Canister Pump Module: Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U011B*1

Lost Communication with Rocker Arm Control Module "A"

The ECM does not receive data from the continuously variable valve lift controller assembly for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The power source voltage of the ECM is 8 V or more.

Turn the ignition switch ON and wait for at least approximately 2 seconds.

MIL illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0124

Lost Communication with Lateral Acceleration Sensor Module

The ECM does not receive data from the airbag sensor assembly for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

MIL illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

MIL illuminates.

-

DTC is stored until it is cleared using the Techstream.

(b) Brake Actuator Assembly / Techstream Display "ABS/VSC/TRAC/EPB"

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0073

Control Module Communication Bus Off

A communication error (bus-off status) occurs consecutively for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The power source voltage of the brake booster with master cylinder assembly is 9.6 to 16.5 V.

Turn the ignition switch ON and wait for at least approximately 2 seconds.

  • ABS warning light illuminates.
  • Brake warning light illuminates.
  • Slip indicator light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0100

Lost Communication with ECM/PCM "A"

The brake actuator assembly does not receive data from the ECM for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • Vehicle speed is 6 km/h (4 mph) or more.
  • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 2 seconds or more.

  • Slip indicator light illuminates.
  • Electric parking brake warning light illuminates.
  • Brake hold operated indicator light blinks.

-

DTC is stored until it is cleared using the Techstream.

U0123

Lost Communication with Yaw Rate Sensor Module

The brake actuator assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • Vehicle speed is 6 km/h (4 mph) or more.
  • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 2 seconds or more.

  • Slip indicator light illuminates.
  • Electric parking brake warning light illuminates.
  • Brake hold operated indicator light blinks.

-

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The brake actuator assembly does not receive data from the steering sensor for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • Vehicle speed is 6 km/h (4 mph) or more.
  • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 2 seconds or more.

  • Slip indicator light illuminates.
  • Electric parking brake warning light illuminates.
  • Brake hold operated indicator light blinks.

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The brake actuator assembly does not receive data from the main body ECU (multiplex network body ECU) approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

Turn the ignition switch ON and wait for at least approximately 2 seconds.

  • Electric parking brake warning light illuminates.
  • Brake hold operated indicator light blinks.

-

DTC is stored until it is cleared using the Techstream.

(c) Power Steering ECU Assembly / Techstream Display "EMPS"

Chassis > EMPS > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The power steering ECU assembly does not receive data from the ECM for approximately 5 minutes or more.

All conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • Vehicle speed is 20 km/h (12 mph) or more.
  • The power source voltage of the power steering ECU assembly is 9 V or more.

Drive the vehicle at a speed of 20 km/h (12 mph) or more for approximately 5 minutes or more.

-

-

DTC remains stored only while malfunction is occurring.

U0129

Lost Communication with Brake System Control Module

The power steering ECU assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the power steering ECU assembly is 9 V or more.

Turn the ignition switch ON and wait for at least approximately 6 seconds.

EPS warning light illuminates.

-

DTC remains stored only while malfunction is occurring.

U023A

Lost Communication with Front Camera Module

The power steering ECU assembly does not receive data from the forward recognition camera for approximately 2 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the power steering ECU assembly is 9 V or more.

Turn the ignition switch ON and wait for at least approximately 5 seconds.

-

-

DTC remains stored only while malfunction is occurring.

(d) Main Body ECU (Multiplex Network Body ECU) / Techstream Display "Main Body"

Body Electrical > Main Body > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0101

Lost Communication with TCM

The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0120

Lost Communication with Starter / Generator Control Module

The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The main body ECU (multiplex network body ECU) does not receive data from the brake actuator assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0151

Lost Communication with Restraints Control Module

The main body ECU (multiplex network body ECU) does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0182

Lost Communication with AFS

The main body ECU (multiplex network body ECU) does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U023A

Lost Communication With Image Processing Module "A"

The main body ECU (multiplex network body ECU) does not receive data from the forward recognition camera for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 15 seconds.

Automatic high beam indicator light blinks.

-

DTC is stored until it is cleared using the Techstream.

U0327

Software Incompatibility with Vehicle Security Control Module

The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(e) Certification ECU (Smart Key ECU Assembly) / Techstream Display "Smart Key"

Body Electrical > Smart Key > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 10 seconds or more.

Both conditions are met:

  • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(f) Certification ECU (Smart Key ECU Assembly) / Techstream Display "Power Source Control"

Body Electrical > Power Source Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM Communication

The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 4 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0140

Lost Communication with Body Control Module

The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 4 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(g) Headlight ECU Sub-assembly LH / Techstream Display "HL AutoLeveling"

Body Electrical > HL AutoLeveling > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to Lighting System.

    Click here

  • *2: Refer to Lighting System.

    Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0073

Control Module Communication Bus Off

The headlight ECU sub-assembly LH does not send/receive data.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0100

Lost Communication with ECM/PCM "A"

The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The headlight ECU sub-assembly LH does not receive data from the brake booster with master cylinder assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0242*1

Lost Communication with Headlamp Control Module "B"

The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 13 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U1000*2

CAN Communication Failure(Message Registry)

CAN communication malfunction (message register)

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(h) Combination Meter Assembly / Techstream Display "Combination Meter"

Body Electrical > Combination Meter > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The combination meter assembly does not receive data from the ECM for approximately 2 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

MIL illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The combination meter assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

  • Brake warning light illuminates.
  • Slip indicator light illuminates.
  • ABS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0131

Lost Communication with Power Steering Control Module

The combination meter assembly does not receive data from the power steering ECU assembly for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 3 seconds.

EPS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The combination meter assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 10 seconds.

Tire pressure warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0151

Lost Communication with Restraints Control Module

The combination meter assembly does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 10 seconds.

SRS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0182

Lost Communication with Lighting Control Module Front

The combination meter assembly does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 10 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0235

Lost Communication with Cruise Control Front Distance Range Sensor

The combination meter assembly does not receive data from the millimeter wave radar sensor assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 10 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U023A

Lost Communication with Front Camera Module

When either of the following conditions is met*1:

  • The combination meter assembly does not receive data from the forward recognition camera for approximately 10 seconds or more.
  • The combination meter assembly does not receive data from the millimeter wave radar sensor assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the combination meter assembly is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 10 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

  • *1: When U0235 and U023A are output simultaneously, there may be a malfunction in the millimeter wave radar sensor assembly.

(i) Air Conditioning Amplifier Assembly / Techstream Display "Air Conditioner"

Body Electrical > Air Conditioner > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM

The air conditioning amplifier assembly does not receive data from the ECM for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 5 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0131

Lost Communication With Power Steering Control Module

The air conditioning amplifier assembly does not receive data from the power steering ECU assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 5 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication With Body Control Module "B"

The air conditioning amplifier assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 5 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

The air conditioning amplifier assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON.
  • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 5 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(j) Airbag Sensor Assembly / Techstream Display "SRS Airbag"

Body Electrical > SRS Airbag > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0154

Lost Communication with Restraints Occupant Classification System Module

The airbag sensor assembly does not receive data from the occupant detection ECU for approximately 5 seconds or more.

The ignition switch is ON for approximately 3 seconds or more.

Turn the ignition switch ON and wait for at least approximately 8 seconds.

SRS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

(k) Occupant Detection ECU / Techstream Display "Occupant Detection"

Body Electrical > Occupant Detection > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0125

Lost Communication With Multi-axis Acceleration Sensor Module

The occupant detection ECU does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the occupant detection ECU is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 8 seconds.

SRS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication With Brake System Control Module

The occupant detection ECU does not receive data from the brake booster with master cylinder assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the occupant detection ECU is 9.5 V or more.

Turn the ignition switch ON and wait for at least approximately 8 seconds.

SRS warning light illuminates.

-

DTC is stored until it is cleared using the Techstream.

(l) ECM / Techstream Display "Cruise Control"

Powertrain > Cruise Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0122

Lost Communication with Vehicle Dynamics Control Module

The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the cruise control main switch on and wait at least approximately 4 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(m) ECM / Techstream Display "Radar Cruise1"

Powertrain > Radar Cruise1 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The ECM does not receive data from the brake actuator assembly for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the cruise control main switch on and wait at least approximately 2 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0122

Lost Communication with Vehicle Dynamics Control Module

The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the cruise control main switch on and wait at least approximately 4 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U1104

Lost Communication with Cruise Control Module

The ECM does not receive data from the millimeter wave radar sensor assembly for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • The power source voltage of the ECM is 10.5 V or more.

Turn the cruise control main switch on and wait at least approximately 2 seconds.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(n) Millimeter Wave Radar Sensor Assembly / Techstream Display "Radar Cruise2"

Powertrain > Radar Cruise2 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The millimeter wave radar sensor assembly does not receive data from the ECM for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the cruise control main switch on and drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 2 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0125

Lost Communication with Yaw Rate Sensor Module

The millimeter wave radar sensor assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The cruise control main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the cruise control main switch on and drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 4 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The millimeter wave radar sensor assembly does not receive data from the steering sensor for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The cruise control main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the cruise control main switch on and drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 2 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The millimeter wave radar sensor assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The cruise control main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the cruise control main switch on and drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 5 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(o) Millimeter Wave Radar Sensor Assembly / Techstream Display "Pre-Collision 2"

Body Electrical > Pre-Collision 2 > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to Pre-Collision System.

    Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The millimeter wave radar sensor assembly does not receive data from the ECM for approximately 1 second or more.

All conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 4 seconds or more.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0125

Lost Communication with Yaw Rate Sensor Module

The millimeter wave radar sensor assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The millimeter wave radar sensor assembly does not receive data from the steering sensor for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The millimeter wave radar sensor assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0235*1

Lost Communication with Cruise Control Front Distance Range Sensor

The millimeter wave radar sensor assembly does not receive data from the brake actuator assembly for approximately 2 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U023A*1

Lost Communication with Image Processing Module "A"

The millimeter wave radar sensor assembly does not receive data from the forward recognition camera for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U1002*1

Lost Communication with Gateway Module

The millimeter wave radar sensor assembly does not receive data from the forward recognition camera for approximately 1 second or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 4 seconds.

PCS indicator blinks.

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(p) Forward Recognition Camera / Techstream Display "LKA/LDA"

Chassis > LKA/LDA > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to Lane Departure Alert System.

    Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the LDA main switch on and then drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0123

Lost Communication with Yaw Rate Sensor Module

The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the LDA main switch on and then drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • Vehicle speed is 1 km/h (1 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the LDA main switch on and then drive the vehicle at a speed of 1 km/h (1 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0131

Lost Communication with Power Steering Control Module

The forward recognition camera does not receive data from the power steering ECU assembly for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the LDA main switch on and then drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON, turn the LDA main switch on and wait for at least approximately 7 seconds.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter)

The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON, turn the LDA main switch on and wait for at least approximately 52 seconds.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0235*1

Lost Communication with Cruise Control Front Distance Range Sensor

The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U023A*1

Lost Communication with Image Processing Module "A"

The power steering ECU assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The LDA main switch is on.
  • Vehicle speed is 5 km/h (3 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the LDA main switch on and then drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more.

LDA indicator illuminates (yellow).

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(q) Forward Recognition Camera / Techstream Display "Front Recognition Camera"

Chassis > Front Recognition Camera > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to Front Recognition Camera System.

    Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • Vehicle speed is 1 km/h (1 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Drive the vehicle at a speed of 1 km/h (1 mph) or more for approximately 7 seconds or more.

-

-

DTC is stored until it is cleared using the Techstream.

U0101

Lost Communication with TCM

The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • Vehicle speed is 1 km/h (1 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Drive the vehicle at a speed of 1 km/h (1 mph) or more for approximately 7 seconds or more.

-

-

DTC is stored until it is cleared using the Techstream.

U0123

Lost Communication with Yaw Rate Sensor Module

The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • Vehicle speed is 1 km/h (1 mph) or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Drive the vehicle at a speed of 1 km/h (1 mph) or more for approximately 7 seconds or more.

-

-

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0131

Lost Communication with Power Steering Control Module

The forward recognition camera does not receive data from the power steering ECU assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The forward recognition camera does not receive data from the combination meter assembly for approximately 5 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0235*1

Lost Communication with Cruise Control Front Distance Range Sensor

The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U023A*1

Lost Communication with Image Processing Module "A"

The power steering ECU assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The power source voltage of the forward recognition camera is 10 V or more.

Turn the ignition switch ON and wait for at least approximately 7 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(r) Blind Spot Monitor Sensor LH / Techstream Display "Blind Spot Monitor Master"

Body Electrical > Blind Spot Monitor Master > Trouble Codes

HINT:

  • This ECU uses the CAN communication system for DTC communication.
  • *1: Refer to Blind Spot Monitor System.

    Click here

  • *2: Refer to Blind Spot Monitor System.

    Click here

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0100

Lost Communication with ECM/PCM "A"

The blind spot monitor sensor LH does not receive data from the ECM for approximately 11 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 12 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0125

Lost Communication with Yaw Rate Sensor Module

The blind spot monitor sensor LH does not receive data from the airbag sensor assembly for approximately 4 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 5 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0126

Lost Communication with Steering Angle Sensor Module

The blind spot monitor sensor LH does not receive data from the steering sensor for approximately 11 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 12 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0129

Lost Communication with Brake System Control Module

The blind spot monitor sensor LH does not receive data from the brake booster with master cylinder assembly for approximately 3 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 2 seconds or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 5 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0142

Lost Communication with Body Control Module "B"

The blind spot monitor sensor LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 12 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U0232*1

Lost Communication with Blind Spot Monitor Slave Module

The blind spot monitor sensor LH does not receive data from the blind spot monitor sensor RH for approximately 11 seconds or more.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 12 seconds or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

U1331*2

Software Incompatibility with Body Control Module "B"

Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor LH do not match.

All conditions are met:

  • The ignition switch is ON for approximately 1 second or more.
  • The blind spot monitor main switch is on.
  • The power source voltage of the blind spot monitor sensor LH is 10 V or more.

Turn the ignition switch ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for approximately 1 second or more.

-

Displays messages on the multi-information display.

DTC is stored until it is cleared using the Techstream.

(s) Radio and Display Receiver Assembly / Techstream Display "Navigation System"

Body Electrical > Navigation System > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0073

Sending Malfunction (Navigation to APGS)

The radio and display receiver assembly does not send/receive data for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0100

Engine ECU Communication

The radio and display receiver assembly does not receive data from the ECM for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0129

VSC(ECB)ECU Communication

The radio and display receiver assembly does not receive data from the brake actuator assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0140

Lost Communication with Body Control Module

The radio and display receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Meter ECU Communication

The radio and display receiver assembly does not receive data from the combination meter assembly for approximately 30 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 30 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 60 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0164

Air Conditioner ECU Communication

The radio and display receiver assembly does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0198

Lost Communication with Telematic Control Module

The radio and display receiver assembly does not receive data from the DCM (telematics transceiver) for approximately 3 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 3 seconds or more.
  • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 6 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(t) DCM (Telematics Transceiver) / Techstream Display "Telematics"

Body Electrical > Telematics > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC

Detection Item

DTC Detection Condition

DTC Detection Pre-condition

DTC Check Procedure

Warning Displayed

DTC Storage Method

Indication in Meter

Multi-information Display

U0142

Lost Communication with Body Control Module "B"

The DCM (telematics transceiver) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The DCM (telematics transceiver) does not receive data from the combination meter assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

U0163

Lost Communication with Navigation Control Module

The DCM (telematics transceiver) does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.

Both conditions are met:

  • The ignition switch is ON for approximately 10 seconds or more.
  • The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.

Turn the ignition switch to ON and wait for at least approximately 20 seconds.

-

-

DTC is stored until it is cleared using the Techstream.

(u) Central Gateway ECU (Network Gateway ECU) / Techstream Display "Central Gateway"

HINT:

The central gateway ECU (network gateway ECU) is connected to the CAN communication system, but the central gateway ECU (network gateway ECU) does not store or output CAN communication DTCs.

(v) Steering Sensor / Techstream Display "-"

HINT:

The steering sensor is connected to the CAN communication system, but the steering sensor does not store or output CAN communication DTCs.

CAN BUS WAVEFORMS

HINT:

  • This waveform is measured between terminals CANH and GND, and terminals CANL and GND of the central gateway ECU (network gateway ECU). (Use this as a reference for diagnosis of CAN communication lines.)
  • When malfunctions in multiple ECUs are suspected based on the CAN bus check and DTCs checked using the Techstream, check the resistance of the CAN bus using an ohmmeter first. If no problems are found, check the following waveforms.

    Click here

  • If a waveform is not similar to one of the following 3 patterns (Group 1), then an open in a CAN main bus line, an open in a CAN branch line, or a short between a CAN line (CANH or CANL) and ground is suspected (Group 2).
  • Wiggle the connector and wire harness to check if the waveform changes.

(a) CAN bus waveforms (Group 1)

(1) Normal waveform

(2) Open in both of the lines (CANH and CANL) of a CAN branch

HINT:

  • Waveforms (waveforms shown using dotted lines) are not present from an ECU or sensor connected to a CAN branch with an open circuit in both lines. (Waveforms from other ECUs or sensors are normal.)
  • Because this waveform is similar to a normal waveform, instead of using the waveform, the malfunctioning part can be narrowed down by performing a CAN bus check.

(3) Short between the CAN bus lines (CANH and CANL)

HINT:

  • Waveforms disappear.
  • If the malfunction is in an ECU, disconnecting the ECU will change the waveform. If the waveform does not change, a malfunction in the wire harness is suspected.

(b) CAN bus waveforms (reference) (Group 2)

NOTICE:

The following CAN bus waveforms can be used only as reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.

(1) Open in a CAN branch line (CANH)

HINT:

  • An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
  • Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

(2) Open in a CAN branch line (CANL)

HINT:

  • An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
  • Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

(3) Open in a CAN main bus line (CANH)

HINT:

  • Waveforms of ECUs or sensors that are closer to the central gateway ECU (network gateway ECU) than the open part are almost normal.
  • Waveforms of ECUs or sensors that are on the opposite side of the central gateway ECU (network gateway ECU) from the open part are abnormal.
  • An open in a CAN main bus line can be confirmed by measuring the resistance between the CANH and CANL terminals of any CAN branch.

(4) Short between a CAN bus line (CANH) and ground

HINT:

  • Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
  • A short to ground in the CANH line can be confirmed by measuring the resistance between CANH and ground using an ohmmeter.

(5) Short between a CAN bus line (CANL) and ground

HINT:

  • Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
  • A short to ground in the CANL line can be confirmed by measuring the resistance between CANL and ground using an ohmmeter.

DATA SENDING/RECEIVING TABLE

(a) Data sending/receiving table

HINT:

If Data List items related to sent/received data are not displayed properly, the part for which communication is interrupted can be determined using the table below.

Data Content

Data Detected and Sent by

Data Received by

Relevant Data List Item

Can be Checked in the Data List

Cannot be Checked in the Data List

Selected System

Data List Items

Link

Accelerator position

ECM

Brake actuator assembly

  • Forward recognition camera
  • Radio and display receiver assembly
  • Millimeter wave radar sensor assembly

Engine and ECT

Accelerator Position (w/ Canister Pump Module)

Accelerator Position (w/o Canister Pump Module)

ABS/VSC/TRAC/EPB

Accelerator Opening Angle %

Engine speed

ECM

  • Brake actuator assembly
  • Power steering ECU assembly
  • Airbag sensor assembly
  • Combination meter assembly
  • Certification ECU (smart key ECU assembly)
  • Main body ECU (multiplex network body ECU)
  • DCM (telematics transceiver)
  • Radio and display receiver assembly

Engine and ECT

Engine Speed (w/ Canister Pump Module)

Engine Speed (w/o Canister Pump Module)

ABS/VSC/TRAC/EPB

Engine Revolution

EMPS

Engine Revolution

Engine coolant temperature

ECM

  • Combination meter assembly
  • Air conditioning amplifier assembly

-

Engine and ECT

Coolant Temperature (w/ Canister Pump Module)

Coolant Temperature (w/o Canister Pump Module)

Combination Meter

Coolant Temperature

Air Conditioner

Engine Coolant Temp (w/ Top-mounted Air Conditioner Pressure Sensor)

Engine Coolant Temp (w/ Side-mounted Air Conditioner Pressure Sensor)

Vehicle speed

Brake actuator assembly

  • Power steering ECU assembly
  • ECM
  • Combination meter assembly
  • Radio and display receiver assembly
  • Millimeter wave radar sensor assembly
  • Occupant detection ECU
  • Forward recognition camera
  • Airbag sensor assembly
  • Certification ECU (smart key ECU assembly)
  • Main body ECU (multiplex network body ECU)
  • DCM (telematics transceiver)

ABS/VSC/TRAC/EPB

Vehicle Speed

EMPS

Meter Vehicle Velocity

Engine and ECT

Vehicle Speed (w/ Canister Pump Module)

Vehicle Speed (w/o Canister Pump Module)

Combination Meter

Vehicle Speed Meter

Navigation System

Vehicle Speed

Radar Cruise2

Vehicle Spd-Brake ECU

Occupant Detection

VSC Vehicle Speed

Vehicle speed

Combination meter assembly*3

-

  • Certification ECU (smart key ECU assembly)
  • Main body ECU (multiplex network body ECU)
  • Air conditioning amplifier assembly

Combination Meter

Vehicle Speed Meter

Wheel speed

Brake actuator assembly

  • Headlight ECU sub-assembly LH
  • Power steering ECU assembly
  • Forward recognition camera
  • Airbag sensor assembly
  • Millimeter wave radar sensor assembly

ABS/VSC/TRAC/EPB

  • FR Wheel Speed
  • FL Wheel Speed
  • RR Wheel Speed
  • RL Wheel Speed

HL Auto Leveling

  • Front Right Wheel Speed Value
  • Front Left Wheel Speed Value

EMPS

  • Wheel Speed Right
  • Wheel Speed Left

Shift position

ECM

  • Blind spot monitor sensor LH
  • Certification ECU (smart key ECU assembly)
  • Radio and display receiver assembly
  • Forward recognition camera
  • Airbag sensor assembly
  • Combination meter assembly*2
  • Main body ECU (multiplex network body ECU)
  • Air conditioning amplifier assembly
  • Millimeter wave radar sensor assembly
  • Headlight ECU sub-assembly LH

Engine and ECT

Neutral Position SW (w/ Canister Pump Module)

Neutral Position SW (w/o Canister Pump Module)

Power Source Control

Shift P Signal

Navigation System

Reverse Signal

Blind Spot Monitor Master

Reverse (Only for AT/CVT)

Ambient temperature

Air conditioning amplifier assembly

Combination meter assembly

  • ECM
  • Brake actuator assembly
  • Forward recognition camera
  • Radio and display receiver assembly
  • Millimeter wave radar sensor assembly

Air Conditioner

Ambient Temp Sensor (w/ Top-mounted Air Conditioner Pressure Sensor)

Ambient Temp Sensor (w/ Side-mounted Air Conditioner Pressure Sensor)

Combination Meter

Ambient Temperature

Driver door courtesy switch

Main body ECU (multiplex network body ECU)

-

  • Forward recognition camera
  • Combination meter assembly*2
  • Certification ECU (smart key ECU assembly)
  • Air conditioning amplifier assembly
  • Radio and display receiver assembly
  • DCM (Telematics Transceiver)

Main Body

FL Door Courtesy SW

Steering angle

Steering sensor

  • Blind spot monitor sensor LH
  • Power steering ECU assembly
  • Brake actuator assembly
  • Millimeter wave radar sensor assembly
  • ECM
  • Forward recognition camera
  • Airbag sensor assembly
  • Radio and display receiver assembly

Blind Spot Monitor Master

Steering Angle

EMPS

Steering Angle Velocity

ABS/VSC/TRAC/EPB

Steering Angle Sensor

Radar Cruise2

Steering Angle

Yaw rate

Airbag sensor assembly

  • Brake actuator assembly
  • Millimeter wave radar sensor assembly
  • Forward recognition camera
  • Power steering ECU assembly

ABS/VSC/TRAC/EPB

  • Yaw Rate Sensor
  • Yaw Rate Sensor2

Radar Cruise2

Yaw Rate Sensor

Acceleration

Airbag sensor assembly

  • Brake actuator assembly
  • Occupant detection ECU
  • Forward recognition camera
  • Power steering ECU assembly
  • ECM
  • Millimeter wave radar sensor assembly

ABS/VSC/TRAC/EPB

  • Deceleration Sensor
  • Deceleration Sensor2

Occupant Detection

  • Yaw Rate/G Sensor Invalid Flag1
  • Yaw Rate/G Sensor Invalid Flag2

Ignition switch condition

Main body ECU (multiplex network body ECU)

Headlight ECU sub-assembly LH

Certification ECU (smart key ECU assembly)

Main Body

IG SW

HL Auto Leveling

+B

Stop light switch signal

Brake actuator assembly

Certification ECU (smart key ECU assembly)

  • Airbag sensor assembly
  • Combination meter assembly
  • Radio and display receiver assembly
  • DCM (Telematics Transceiver)

ABS/VSC/TRAC/EPB

Stop Light SW

Power Source Control

Stop Light Switch1

Headlight switch signal

(high beam)

Main body ECU (multiplex network body ECU)

Headlight ECU sub-assembly LH

  • Forward recognition camera
  • Combination meter assembly*2
  • Millimeter wave radar sensor assembly

Main Body

Head Light SW (Head)

HL Auto Leveling

HeadLight High Beam State

Side turn signal

Combination meter assembly*2

  • Blind spot monitor sensor LH
  • Forward recognition camera
  • Headlight ECU sub-assembly LH
  • Millimeter wave radar sensor assembly

Combination Meter

  • Turn Signal Switch (Right)
  • Turn Signal Switch (Left)

Blind Spot Monitor Master

Turn Switch State

LKA/LDA

  • Turn Signal Switch (Right)
  • Turn Signal Switch (Left)

Taillight signal

Main body ECU (multiplex network body ECU)

Headlight ECU sub-assembly LH

  • Blind spot monitor sensor LH
  • Combination meter assembly
  • Millimeter wave radar sensor assembly

Main Body

Head Light SW (Tail)

HL Auto Leveling

Clearance Light State

ECM power source voltage*1

ECM

-

-

Engine and ECT

BATT Voltage

Combination meter assembly power source voltage*1

Combination meter assembly

-

-

Combination Meter

+B Voltage Value

Power steering ECU assembly power source voltage*1

Power steering ECU assembly

-

-

EMPS

IG Power Supply

Headlight ECU sub-assembly LH power source voltage*1

Headlight ECU sub-assembly LH

-

-

HL Auto Leveling

+B Voltage Value

Driver door touch sensor*1

Certification ECU (smart key ECU assembly)

-

-

Smart Key

D-Door Touch Sensor

Blind spot monitor main switch condition*1

Blind spot monitor sensor LH

-

-

Blind Spot Monitor Master

Main Switch

Solar sensor*1

Air conditioning amplifier assembly

-

-

Air Conditioner

Solar Sensor (D Side) (w/ Top-mounted Air Conditioner Pressure Sensor)

Solar Sensor (D Side) (w/ Side-mounted Air Conditioner Pressure Sensor)

Radio and display receiver assembly power source voltage*1

Radio and display receiver assembly

-

-

Navigation System

Battery Voltage

  • *1: Whether the ECU that sends data is functioning or not can be judged by using the Techstream to check items such as switches or sensors that send signals to the ECU via direct lines.
  • *2: Although the received contents cannot be checked in the Data List, whether or not the data is received normally can be checked by observing the combination meter assembly.
  • *3: The combination meter assembly receives a vehicle speed signal from the brake actuator assembly and sends the signal to other ECUs.
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