VEHICLE STABILITY CONTROL SYSTEM Brake Warning Light does not Come ON

DESCRIPTION

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

CAUTION / NOTICE / HINT

Note

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

Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

      for LHD: Click here

      for RHD: Click here

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

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING GTS (BRAKE WARNING LIGHT [RED INDICATOR])


    1. Connect the GTS to the DLC3.

    2. Turn the engine 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
      Brake Warning Light Brake warning light (red indicator) Warning light ON/OFF Can be observed on the combination meter assembly

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      Brake Warning Light

    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
      Brake Warning Light Brake warning light (red indicator) ON or OFF

      ON: Warning light on

      OFF: Warning light off

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      Brake Warning Light

    5. Check the operating condition of the brake warning light (red indicator) when operating it using the GTS.

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

      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 parts.

      Click here


    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

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

      Click here


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

    3. Check the combination meter assembly.

      OK
      The brake warning light (red indicator) turns on or off in accordance with the Active Test 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 parts.

      Click here

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

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    INSPECT METER / GAUGE SYSTEM Click here