ELECTRONICALLY CONTROLLED BRAKE SYSTEM ABS Warning 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.

CAUTION / NOTICE / HINT

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.


      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (for RHD). B
      DTCs are output (for LHD). C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (ABS WARNING LIGHT)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the Active Test on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      ABS Warning Light ABS warning light Warning light ON/OFF Observe combination meter assembly

    4. Select the Data List on the GTS.

      Click here


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      ABS Warning Light ABS warning light ON or OFF

      ON: Warning light on

      OFF: Warning light off

      		 -

      Chassis > ABS/VSC/TRC > Active Test
      Active Test Display
      ABS Warning Light
      Data List Display
      ABS Warning Light

    5. Check the operating condition of the ABS warning light when operating it using the GTS.

      Result
      Result Proceed to
      ABS warning light in the Data List does not change using the Active Test (for RHD). A
      ABS warning light in the Data List does not change using the Active Test (for LHD). B
      ABS warning light in the Data List turns ON/OFF using the Active Test. C

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

  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 GTS.

      Click here


      Body Electrical > Combination Meter > Active Test
      Tester Display
      Indicat. Lamp ABS

    3. Check the combination meter assembly.

      OK
      The ABS warning light turns on or off in accordance with the GTS operation.
      Result
      Result Proceed to
      OK (for RHD) A
      OK (for LHD) B
      NG C

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    INSPECT METER / GAUGE SYSTEM Click here