Toyota CH-R Service Manual: Air Conditioning Amplifier Communication Stop Mode

Toyota CH-R Service Manual / Networking / Can Communication System / Air Conditioning Amplifier Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Air Conditioning Amplifier Communication Stop Mode

Any of the following conditions are met:

  • Communication stop for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check" screen of the Techstream.

  • Communication stop history for "Air Conditioning Amplifier" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Air Conditioning Amplifier" is 6 or more.)

  • Communication system DTCs (DTCs that start with U) that correspond to "Air Conditioning Amplifier Communication Stop Mode" in "DTC Combination Table" are output.

  • Air conditioning amplifier assembly branch line or connector
  • Power source circuit of air conditioning amplifier assembly
  • Air conditioning amplifier assembly ground circuit
  • Air conditioning amplifier assembly

WIRING DIAGRAM

w/ Top-mounted Air Conditioner Pressure Sensor

w/ Side-mounted Air Conditioner Pressure Sensor

CAUTION / NOTICE / HINT

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait at least approximately 20 seconds.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/ Top-mounted Air Conditioner Pressure Sensor

A

w/ Side-mounted Air Conditioner Pressure Sensor

B

B

GO TO STEP 4

A

2.

CHECK FOR OPEN IN CAN BUS LINES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F72-9 (CANH) -F72-10 (CANL)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F72-29 (GND) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

(b) Reconnect the cable to the negative (-) battery terminal.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F72-1 (B) - Body ground

Always

11 to 14 V

F72-5 (IG+) - Body ground

Ignition switch ON

11 to 14 V

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

4.

CHECK FOR OPEN IN CAN BUS LINES (AIR CONDITIONING AMPLIFIER ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F139-11 (CANH) -F139-12 (CANL)

Cable disconnected from negative (-) battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY)

OK

5.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F139-4 (GND) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

*a

Front view of wire harness connector

(to Air Conditioning Amplifier Assembly)

(b) Reconnect the cable to the negative (-) battery terminal.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F139-1 (B) - Body ground

Always

11 to 14 V

F139-2 (IG+) - Body ground

Ignition switch ON

11 to 14 V

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

    Skid Control ECU Communication Stop Mode
    DESCRIPTION Detection Item Symptom Trouble Area Skid Control ECU Communication Stop Mode Any of the following conditions are met: ...

    Power Steering ECU Communication Stop Mode
    DESCRIPTION Detection Item Symptom Trouble Area Power Steering ECU Communication Stop Mode Any of the following conditions are met: ...

    Other materials:

    Toyota CH-R Service Manual > Window / Glass: Window Defogger Wire
    Precaution PRECAUTION IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ignition Switch (Position) ...

    Toyota CH-R Service Manual > Vehicle Stability Control System: Data List / Active Test
    DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may ...

    © 2017-2019 Copyright www.tochr.net
    0.0163