ELECTRONICALLY CONTROLLED BRAKE SYSTEM ABS Warning Light does not Come ON

DESCRIPTION

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

WIRING DIAGRAM

Refer to ABS Warning Light Remains ON.

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CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

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PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

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      Result
      Proceed to
      DTC is not output
      DTC is output

    DTC is output

    CHECK CAN COMMUNICATION SYSTEM Click here

    DTC is not output

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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

    5. According to the display on the GTS, perform the Active Test.


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

      Observe combination meter

      Vehicle condition: Vehicle stopped

    6. When performing the ABS Warning Light Active Test, check ABS Warning Light in the Data List.


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

      OFF: Warning light off

      ON: Warning light on

      		 -

      Chassis > ABS/VSC/TRC > Active Test
      Active Test Display
      ABS Warning Light
      Data List Display
      ABS Warning Light
      Result
      Result Proceed to
      ABS warning light in the Data List does not change using the Active Test A
      ABS warning light in the Data List turns ON/OFF using the Active Test B

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

    B

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

    2. Perform Active Test of the combination meter assembly using the GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display
      ABS Warning

    3. Check the combination meter assembly.

      OK
      The ABS warning light turns on or off in accordance with the GTS.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

    NG

    INSPECT METER / GAUGE SYSTEM Click here