Toyota CH-R Service Manual: Power Source Mode does not Change to ON (IG and ACC)

Toyota CH-R Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Start Function) / Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

If any of the following operations are performed, the certification ECU (smart key ECU assembly) receives a signal, and changes the power source mode.

  • With the electrical key transmitter sub-assembly in the cabin, the engine switch is pressed.
  • When the transmitter battery of the electrical key transmitter sub-assembly is depleted, the brake pedal is depressed with the electrical key transmitter sub-assembly held near the engine switch.
  • When the smart key system has been canceled, the brake pedal is depressed with the electrical key transmitter sub-assembly held near the engine switch.
Related Data List and Active Test Items

Problem Symptom

Data List and Active Test

Power source mode does not change to on (IG) or on (ACC)

Power Source Control
  • Start Switch1
  • Start Switch2
  • IG Relay Monitor (Inside)
  • ACC Relay Monitor
  • IG Relay Monitor (Outside)
  • Latch Circuit
  • Power Supply Condition
Starting Control
  • Ignition

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.
  • If the smart key start system (for Start Function) has been canceled, enable the system before performing troubleshooting.

    Click here

  • Inspect the fuses of circuits related to this system before performing the following procedure.
  • Before replacing the certification ECU (smart key ECU assembly) or an electrical key transmitter sub-assembly, refer to smart key system (for Start Function) Precaution.

    Click here

  • After completing repairs, confirm that the problem does not recur.

HINT:

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE

1.

CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

(a) Press a switch of the electrical key transmitter sub-assembly.

OK:

The electrical key transmitter sub-assembly LED illuminates.

NG

GO TO STEP 25

OK

2.

READ VALUE USING TECHSTREAM (KEY LOW BATTERY)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Smart Key / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Smart Key > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Key Low Battery

Transmitter battery depleted

No or Yes

No: Transmitter battery not depleted

Yes: Transmitter battery depleted

The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).

Body Electrical > Smart Key > Data List

Tester Display

Key Low Battery

OK:

"No" is displayed on the Techstream screen.

NG

REPLACE TRANSMITTER BATTERY

OK

3.

CHECK ENTRY LOCK OPERATION

(a) Check that the entry lock and unlock functions operate on each door.

Click here

HINT:

If the electrical key and TPMS receiver assembly is defective, code verification does not begin in the cabin and the entry lock and unlock functions do not operate.

Result

Proceed to

Entry functions operate normally for all doors

A

An entry function does not operate normally for a door

B

B

GO TO OTHER PROBLEM

A

4.

CHECK SMART KEY SYSTEM (for Start Function)

(a) Remove the transmitter battery from the electrical key transmitter sub-assembly.

(b) With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the engine switch and check if the power source mode changes.

HINT:

If the power source mode changes, the cabin verification is malfunctioning.

OK:

The power source mode changes.

*1

Engine Switch

*2

Electrical Key Transmitter Sub-assembly

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B

B

GO TO STEP 18

A

5.

CHECK WAVE ENVIRONMENT

(a) Install the transmitter battery to the electrical key transmitter sub-assembly.

Click here

(b) Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor) and perform a smart key system check.

Click here

NOTICE:

Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor).

(c) Bring the electrical key transmitter sub-assembly near the No. 3 indoor electrical key antenna assembly (inside luggage compartment) and perform a smart key system check.

Click here

NOTICE:

Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

HINT:

Check that the customize setting "Ignition Available Area" is set to "All".

HINT:

  • As the effect of wave interference decreases by moving the electrical key transmitter sub-assembly close to each indoor electrical key antenna assembly, it may be possible to check whether wave interference is the cause of the problem.
  • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
  • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
  • If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

OK:

The engine starts when the electrical key transmitter sub-assembly is held near each indoor electrical key antenna assembly and the engine switch is pressed with the brake pedal depressed.

OK

AFFECTED BY WAVE INTERFERENCE

NG

6.

CHECK FOR DTC (SMART KEY)

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

7.

CHECK FOR DTC (POWER SOURCE CONTROL)

(a) Check for DTCs.

Body Electrical > Power Source Control > Trouble Codes

OK:

DTCs are not output.

NG

GO TO DIAGNOSTIC TROUBLE CODE CHART

OK

8.

CHECK KEY DIAGNOSTIC MODE

(a) Check the following antennas in key diagnostic mode.

Body Electrical > Smart Key > Utility

Tester Display

Communication Check(Key Diag Mode)

HINT:

  • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
  • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
  • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage compartment) is operating by the sounding of the buzzer.
  • When the wireless buzzer sounds for all indoor electrical key antenna assemblies, they can be judged as operating properly and a malfunction in the certification ECU (smart key ECU assembly), which performs verification, is suspected.
  • When the wireless buzzer does not sound for all indoor electrical key antenna assemblies, it can be judged that the certification ECU (smart key ECU assembly), which controls the indoor electrical key antenna assemblies, is malfunctioning.

(b) Check the No. 1 indoor electrical key antenna assembly (front floor).

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

*a

Inspection Point

(c) Check the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

*a

Inspection Point

Result

Proceed to

The wireless buzzer does not sound for all indoor electrical key antenna assemblies

A

The wireless buzzer does not sound for only the No. 1 indoor electrical key antenna assembly (front floor)

B

The wireless buzzer does not sound for only the No. 3 indoor electrical key antenna assembly (inside luggage compartment)

C

The wireless buzzer sounds for all indoor electrical key antenna assemblies

D

A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

C

GO TO STEP 12

D

GO TO STEP 15

B

9.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))

(a) Using an oscilloscope, check the waveform.

*a

Front view of wire harness connector

(to No. 1 Indoor Electrical Key Antenna Assembly (Front Floor))

*b

Waveform 1

*c

For 30 seconds after closing any door

*d

After 30 seconds or more have elapsed since any door closed

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

F58-1 (ANTE5) - F58-3 (CLGB)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

10.

REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)

(a) Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one.

Click here

NEXT

11.

CHECK POWER SOURCE MODE

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Press the engine switch with the brake pedal released and check that the power source mode changes.

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B

A

END (NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) WAS DEFECTIVE)

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

12.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))

(a) Using an oscilloscope, check the waveform.

*a

Front view of wire harness connector

(to No. 3 Indoor Electrical Key Antenna Assembly (Inside Luggage Compartment))

*b

Waveform 1

*c

For 30 seconds after closing any door

*d

After 30 seconds or more have elapsed since any door closed

OK:

Tester Connection

Condition

Tool Setting

Specified Condition

M37-1 (ANTE7) - M37-3 (CLGB)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

2 V/DIV., 500 ms/DIV.

Pulse generation

(See waveform 1)

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

OK

13.

REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT)

(a) Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage compartment) with a new one.

Click here

NEXT

14.

CHECK POWER SOURCE MODE

(a) Get into the vehicle while carrying an electrical key transmitter sub-assembly.

(b) Move the shift lever to P.

(c) Press the engine switch with the brake pedal released and check that the power source mode changes.

Result

Proceed to

The power source mode changes

A

The power source mode does not change

B

A

END (NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT) WAS DEFECTIVE)

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

15.

READ VALUE USING TECHSTREAM (START SWITCH1, START SWITCH2)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Power Source Control / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Start Switch1

Engine switch 1 status

OFF or ON

OFF: Engine switch not pressed

ON: Engine switch pressed

  • If the engine switch is pressed for a short time, the display may not change.
  • Use this item to determine if the engine switch input signal is malfunctioning.

Start Switch2

Engine switch 2 status

OFF or ON

OFF: Engine switch not pressed

ON: Engine switch pressed

  • Backup for engine switch 1. However, when the engine switch is pressed and held, the control functions only when both engine switch 1 and 2 are normal.
  • Behaves the same way as engine switch 1.
Body Electrical > Power Source Control > Data List

Tester Display

Start Switch1

Start Switch2

OK:

The Techstream display changes correctly in response to the engine switch operation.

OK

USE SIMULATION METHOD TO CHECK

NG

16.

INSPECT ENGINE SWITCH

(a) Remove the engine switch.

Click here

(b) Inspect the engine switch.

Click here

NG

REPLACE ENGINE SWITCH

OK

17.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH)

(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the F59 engine switch connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F1-23 (SSW1) - F59-5 (SS1)

Always

Below 1 Ω

F1-21 (SSW2) - F59-1 (SS2)

Always

Below 1 Ω

F1-11 (AGND) - F59-6 (AGND)

Always

Below 1 Ω

F1-23 (SSW1) or F59-5 (SS1) - Body ground

Always

10 kΩ or higher

F1-21 (SSW2) or F59-1 (SS2) - Body ground

Always

10 kΩ or higher

F1-11 (AGND) or F59-6 (AGND) - Body ground

Always

10 kΩ or higher

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

18.

CHECK KEY DIAGNOSTIC MODE

(a) Check the following antennas in key diagnostic mode.

Body Electrical > Smart Key > Utility

Tester Display

Communication Check(Key Diag Mode)

HINT:

  • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
  • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
  • It is possible to check if the transponder key amplifier built into the engine switch is operating by the sounding of the buzzer.

(b) Check the engine switch.

Face the logo side of the electrical key transmitter sub-assembly toward the engine switch, hold the electrical key transmitter sub-assembly near the engine switch and check that the wireless buzzer sounds.

*1

Engine Switch

*2

Electrical Key Transmitter Sub-assembly

Result

Proceed to

The wireless buzzer does not sound

A

The wireless buzzer sounds

B

B

REPLACE ENGINE SWITCH

A

19.

CHECK FOR DTC

(a) Using the Techstream, check for certification ECU (smart key ECU assembly) DTCs.

Body Electrical > Power Source Control > Trouble Codes Body Electrical > Smart Key > Trouble Codes

Result

Proceed to

DTCs are not output

A

Smart key system (for Start Function) DTCs are output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

20.

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

OK

21.

CHECK HARNESS AND CONNECTOR (GROUND)

Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

22.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the F1 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the 3A and 3D instrument panel junction block assembly connectors.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F1-16 (ACCD) - 3A-30

Always

Below 1 Ω

F1-17 (IG1D) - 3A-17

Always

Below 1 Ω

3D-3 - Body ground

Always

Below 1 Ω

F1-16 (ACCD) or 3A-30 - Body ground

Always

10 kΩ or higher

F1-17 (IG1D) or 3A-17 - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

23.

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1-NO. 1, IG1-NO. 2, IG2-NO. 2, ACC RELAY)

(a) Remove the instrument panel junction block assembly.

Click here

(b) Measure the resistance according to the value(s) in the table below.

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

3A-30 - 3D-3

20°C (68°F)

285.71 to 428.57 Ω

3A-17 - 3D-3

20°C (68°F)

85.69 to 124.1 Ω

3K-1 - 3A-40

Battery voltage applied between terminals 3A-30 and 3D-3

Below 1 Ω

Battery voltage not applied between terminals 3A-30 and 3D-3

10 kΩ or higher

3K-1 - 3F-10

Battery voltage applied between terminals 3A-17 and 3D-3

Below 1 Ω

Battery voltage not applied between terminals 3A-17 and 3D-3

10 kΩ or higher

3K-1 - 3H-12

Battery voltage applied between terminals 3A-17 and 3D-3

Below 1 Ω

Battery voltage not applied between terminals 3A-17 and 3D-3

10 kΩ or higher

3L-1 - 3D-19

Battery voltage applied between terminals 3A-17 and 3D-3

Below 1 Ω

Battery voltage not applied between terminals 3A-17 and 3D-3

10 kΩ or higher

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

OK

24.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Install the instrument panel junction block assembly.

Click here

(b) Reconnect the F1 certification ECU (smart key ECU assembly) connector.

(c) Measure the voltage while confirming the power source mode on the Data List.

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

-

-

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Supply Condition

Power supply state

All OFF, ACC ON, IG ON or ST ON

All OFF: Engine switch off

ACC ON: Engine switch on (ACC)

IG ON: Engine switch on (IG)

ST ON: Sending engine start request signal

-

Body Electrical > Power Source Control > Data List

Tester Display

Power Supply Condition

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F1-17 (IG1D) - Body ground

Engine switch off

1 V or less

Engine switch on (ACC)

1 V or less

Engine switch on (IG)

9 V or higher

F1-16 (ACCD) - Body ground

Engine switch off

1 V or less

Engine switch on (ACC)

8.5 V or higher

Engine switch on (IG)

8.5 V or higher

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

25.

INSPECT TRANSMITTER BATTERY

(a) Inspect the transmitter battery.

Click here

NOTICE:

Do not wrap the lead wire ground a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

OK

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

NG

REPLACE TRANSMITTER BATTERY

    Engine does not Start
    DESCRIPTION When the electrical key transmitter sub-assembly is in the cabin and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the pow ...

    Power Source Mode does not Change to ON (ACC)
    DESCRIPTION If the engine switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power s ...

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