VEHICLE STABILITY CONTROL SYSTEM Slip Indicator Light Remains ON

DESCRIPTION

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

The slip indicator light blinks during VSC and/or TRC operation.

If a malfunction is detected, the slip indicator light comes on to warn the driver Click here.

WIRING DIAGRAM

Refer to ABS Warning Light Remains ON Click here.

CAUTION / NOTICE / HINT

Note


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

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure (w/o Stop and Start System).

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output (See page for with Central Gateway ECU, Click here for without Central Gateway ECU).

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (w/ Central Gateway ECU). B
      DTCs are output (w/o Central Gateway ECU). C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK IF BRAKE ACTUATOR ASSEMBLY CONNECTOR IS SECURELY CONNECTED


    1. Check if the skid control ECU (brake actuator assembly) connector is securely connected.

      OK
      The connector is securely connected.

    NG

    CONNECT CONNECTOR TO BRAKE ACTUATOR ASSEMBLY CORRECTLY

    OK

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V
      Result
      Result Proceed to
      Proper ECM is installed. A
      Proper ECM are not installed (for 2AR-FE). B
      Proper ECM are not installed (for 2GR-FE). C
      Proper ECM are not installed (for 6AR-FSE). D

    B

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    C

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    D

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    A

  4. CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)


    1. A01W4G2E03
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Disconnect the A40 skid control ECU (brake actuator assembly) connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A40-12 (IG1) - Body ground Engine switch on (IG) 10.5 to 16 V
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    C

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) Click here

    A

  5. CHECK HARNESS AND CONNECTOR (GND1 TERMINAL)


    1. A01W4GYE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU (Brake Actuator Assembly))

      Turn the engine switch off.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-25 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)

    OK

  6. READ VALUE USING GTS (SLIP INDICATOR LIGHT)


    1. Reconnect the A40 skid control ECU (brake actuator assembly) connector.

    2. Connect the GTS to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the GTS on.

    5. Select the Data List using the GTS Click here.

      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

      		 -

    6. Check the GTS display condition of the slip indicator light.

      Result
      Result Proceed to
      Display of the Data List remains ON. A
      Display of the Data List remains OFF. B

      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

    INSPECT METER / GAUGE SYSTEM Click here