ELECTRONICALLY CONTROLLED BRAKE SYSTEM TRAC OFF Indicator Light does not Come ON

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) is connected to the combination meter assembly via CAN communication.

INSPECTION PROCEDURE

Note

When replacing the skid control ECU (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


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

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

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING TECHSTREAM (TR(A)C OFF INDICATOR LIGHT)


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the Active Test on the Techstream Click here.

      ABS/VSC/TRAC
      Tester Display Test Part Control Range Diagnostic Note
      TRC(TRAC) OFF Indicator Light TR(A)C OFF indicator light Indicator light ON/OFF Observe combination meter assembly

    4. Check that the TR(A)C OFF indicator light on the combination meter assembly turns on or off in accordance with Techstream operation.

      OK
      The TR(A)C OFF indicator light turns on or off in accordance with Techstream operation.

      Tech Tips

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


    NG

    INSPECT COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the power switch off.

    2. Perform the Active Test of the combination meter assembly (meter CPU) using the Techstream Click here.

    3. Check the combination meter assembly.

      OK
      The TR(A)C OFF indicator light turns on or off in accordance with Techstream operation.

      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

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here