ELECTRONICALLY CONTROLLED BRAKE SYSTEM Slip Indicator Light Circuit

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication. The slip indicator light blinks during VSC operation to inform the driver of system operation and when a slip occurs. When VSC fails, the slip indicator comes on to warn the driver.

WIRING DIAGRAM

A001B4TE07
*1 Combination Meter
*2 Skid Control ECU

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see page and Click here).

PROCEDURE


  1. CHECK DTC FOR ALL SYSTEM


    1. Clear the DTC Click here.

    2. Check for the DTC Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC (CAN communication system) is output (for LHD) B
      DTC (CAN communication system) is output (for RHD) C
      DTC (LIN communication system) is output D

    B

    GO TO CAN COMMUNICATION SYSTEM (for LHD) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (for RHD) Click here

    D

    GO TO LIN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SLIP INDICATOR LIGHT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Select the Active Test mode on the intelligent tester.

      Meter ECU:
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Lamp Slip Turns slip indicator light ON / OFF Confirm that the vehicle is stopped and engine idling

    4. Check that the slip indicator light turns on or off when using the intelligent tester.

      OK
      The slip indicator light turns on or off in accordance with the intelligent tester.

      Tech Tips

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part Click here.


    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  3. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SLIP INDICATOR LIGHT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Select the Active Test mode on the intelligent tester.

      Skid control ECU:
      Tester Display Test Part Control Range Diagnostic Note
      Slip Indicator Light Turns slip indicator light ON / OFF Observe combination meter

    4. Check that the slip indicator light turns on or off when using the intelligent tester.

      OK
      The slip indicator light turns on or off in accordance with the intelligent tester.

      Tech Tips

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part Click here.

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE SKID CONTROL ECU (for LHD) Click here

    C

    REPLACE SKID CONTROL ECU (for RHD) Click here

    A

  4. READ VALUE USING INTELLIGENT TESTER (TRC(TRAC)/VSC OFF SW)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Select the Data List mode on the intelligent tester.

      Skid control ECU:
      Tester Display

      Measurement Item/

      Range

      		 Normal Condition Diagnostic Note
      TRC(TRAC)/VSC OFF SW VSC OFF switch / ON or OFF

      ON: VSC OFF switch OFF

      OFF: VSC OFF switch ON

      		 -

    4. Check that the VSC OFF switch turns on or off on the intelligent tester.

      OK
      VSC OFF switch is operated, and the display changes as shown above.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    CHECK INTERMITTENT PROBLEMS Click here

    B

    REPLACE SKID CONTROL ECU (for LHD) Click here

    C

    REPLACE SKID CONTROL ECU (for RHD) Click here