VEHICLE STABILITY CONTROL SYSTEM TRC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU (master cylinder solenoid) is connected to the combination meter assembly via the CAN communication system.

WIRING DIAGRAM

Refer to TRC OFF Indicator Light Remains ON Click here.

CAUTION / NOTICE / HINT

Note

After replacing the master cylinder solenoid, perform zero point calibration and store the system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION LINE


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

    4. Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

      OK
      "CAN Bus Check" indicates no malfunctions in CAN communication.
      Result
      Result Proceed to
      OK A
      NG (for LHD (with Central Gateway ECU)) B
      NG (for LHD (without Central Gateway ECU)) C
      NG (for RHD (with Central Gateway ECU)) D
      NG (for RHD (without Central Gateway ECU)) E

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    D

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    E

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

    4. for LHD (with Central Gateway ECU):

      Check for DTCs Click here.

    5. for LHD (without Central Gateway ECU):

      Check for DTCs Click here.

    6. for RHD (with Central Gateway ECU):

      Check for DTCs Click here.

    7. for RHD (without Central Gateway ECU):

      Check for DTCs Click here.

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (for LHD (with Central Gateway ECU)) B
      CAN DTC is output (for LHD (without Central Gateway ECU)) C
      CAN DTC is output (for RHD (with Central Gateway ECU)) D
      CAN DTC is output (for RHD (without Central Gateway ECU)) E

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    D

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    E

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  3. READ VALUE USING GTS (TRC/VSC OFF MODE)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      TRC/VSC Off Mode TRC/VSC off mode/ Normal, TRC OFF, Unknown or VSC OFF

      Normal: Normal mode

      TRC OFF: TRC OFF mode

      VSC OFF: VSC OFF mode

      		 -

    6. Check that the mode display changes according to VSC OFF switch*1 or VSC OFF switch (integration control and panel assembly)*2 operation.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

      OK
      Display changes according to switch operation.

    OK

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    NG

  4. INSPECT VSC OFF SWITCH OR INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. w/o Entry and Start System:

      Remove the VSC OFF switch Click here.

    2. w/ Entry and Start System:

      Remove the VSC OFF switch (integration control and panel assembly) Click here.

    3. w/o Entry and Start System:

      Inspect the VSC OFF switch Click here.

    4. w/ Entry and Start System:

      Inspect the VSC OFF switch (integration control and panel assembly) Click here.

      Result
      Result Proceed to
      OK A
      NG (w/o Entry and Start System) B
      NG (w/ Entry and Start System) C

    B

    REPLACE VSC OFF SWITCH Click here

    C

    GO TO INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    A

  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)


    1. Turn the ignition switch off.

    2. Disconnect the A24 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the G13 VSC OFF switch*1 or V9 VSC OFF switch (integration control and panel assembly)*2 connector.


      • *1: w/o Entry and Start System

      • *2: w/ Entry and Start System

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

      Standard Resistance
      w/o Entry and Start System:
      Tester Connection Condition Specified Condition
      A24-9 (CSW) - G13-6 (+) Always Below 1 Ω
      A24-9 (CSW) - Body ground Always 10 kΩ or higher
      G13-3 (E)- Body ground Always Below 1 Ω
      w/ Entry and Start System:
      Tester Connection Condition Specified Condition
      A24-9 (CSW) - V9-7 (+) Always Below 1 Ω
      A24-9 (CSW) - Body ground Always 10 kΩ or higher
      V9-5 (E)- Body ground Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here