ELECTRONICALLY CONTROLLED BRAKE SYSTEM Slip 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.

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
      DTC is not output. A
      CAN communication system DTC is output. (w/o Toyota Safety Sense) B
      CAN communication system DTC is output. (w/ Toyota Safety Sense) C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. READ VALUE USING GTS (BRAKE WARNING LIGHT)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Chassis / ABS/VSC/TRC / Data List

    6. According to the display on the GTS, read the Data List.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Slip Indicator Light Slip indicator light / ON or OFF

      ON: Indicator light on

      OFF: Indicator light off

      		 -

    7. When performing the slip indicator light Active Test, check slip indicator light in the Data List.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      Slip Indicator Light Slip indicator light Indicator light ON/OFF Observe combination meter assembly
      Result
      Result Proceed to
      Slip indicator light in the Data List does not change using the Active Test. (for LHD) A
      Slip indicator light in the Data List does not change using the Active Test. (for RHD) B
      Slip indicator light 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 the part Click here.


    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 ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Combination Meter / Active Test.

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

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Lamp Slip Slip indicator light OFF or ON -
      OK
      The slip indicator light 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 Click here.

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

    A

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    B

    REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Click here

    C

    REPLACE COMBINATION METER ASSEMBLY Click here