VEHICLE STABILITY CONTROL SYSTEM(for Vacuum Brake Booster) TRC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter via the CAN communication system.

WIRING DIAGRAM

Refer to TRC OFF indicator light Remains ON Click here.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform calibration Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output Click here

      Result
      Result Proceed to
      DTC not output A
      DTC output B

    B

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

    A

  2. INSPECT VSC OFF SWITCH


    1. Remove the VSC OFF switch Click here.

    2. Inspect the Remove the VSC OFF switch Click here.


    NG

    REPLACE VSC OFF SWITCH Click here

    OK

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


    1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the G226 VSC OFF switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A6-30 (CSW) - G226-5 Always Below 1 Ω
      A6-30 (CSW) or G226- 5 - Body ground Always 10 kΩ or higher
      G226-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. 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 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 operation.

      OK
      Display changes according to switch operation.

    OK

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

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here