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

DESCRIPTION

Refer to TRC OFF Indicator Light Remains ON Click here

WIRING DIAGRAM

Refer to TRC OFF Indicator Light Remains ON Click here.

INSPECTION PROCEDURE

Note


  • When replacing the brake actuator assembly, perform zero point calibration Click here.

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

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK IF BRAKE ACTUATOR ASSEMBLY CONNECTOR IS SECURELY CONNECTED


    1. Check if the skid control ECU (brake actuator assembly) connector is securely connected.

      OK
      The connector is securely connected.

    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  3. CHECK BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG(1KR-FE) B
      NG(1NR-FE) C

    B

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    C

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    A

  4. READ VALUE USING GTS (VSC OFF SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

      ABS/VSC/TRC
      GTS 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

      Unknown: Unspecified

      VSC OFF: TRC, VSC OFF mode

      		 -

    6. Using the GTS, check the switch condition on the GTS changes according to VSC OFF switch operation.

      OK
      The GTS display changes according to VSC OFF switch operation.

    NG

    Click here

    OK

    GO TO METER / GAUGE SYSTEM Click here

  5. INSPECT VSC OFF SWITCH


    1. A01192ZE02
      Text in Illustration
      *1

      Component without harness connected

      (VSC OFF Switch)

      Turn the ignition switch off.

    2. Disconnect the D54 VSC OFF switch connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3 (E) - 6 (+) Switch is pushed in Below 1 Ω
      3 (E) - 6 (+) Switch is not pushed in 10 kΩ or higher

    NG

    REPLACE VSC OFF SWITCH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - VSC OFF SWITCH)


    1. Disconnect the A16*1 or A17*2 skid control ECU (brake actuator assembly) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      A16-30 (CSW) - D54-6 (+) Always Below 1 Ω
      A16-30 (CSW) or D54-6 (+) - Body ground Always 10 kΩ or higher
      D54-3 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      A17-30 (CSW) - D54-6 (+) Always Below 1 Ω
      A17-30 (CSW) or D54-6 (+) - Body ground Always 10 kΩ or higher
      D54-3 (E) - Body ground Always Below 1 Ω

      Tech Tips

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here