VEHICLE STABILITY CONTROL SYSTEM Slip Indicator Light Remains ON

DTC Code DTC Name
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 or TRC/TRAC operation.

If any of the following is detected, the slip indicator light remains on:

  • The skid control ECU (brake actuator assembly) connectors are disconnected from the brake actuator.

  • There is a malfunction in the skid control ECU (brake actuator assembly) internal circuit.

  • There is an open in the harness between the combination meter assembly and the skid control ECU (brake actuator assembly).

  • The VSC or TRC/TRAC control system is defective.

    Tip:

    In some cases, the GTS cannot be used when the skid control ECU (brake actuator assembly) is abnormal.

WIRING DIAGRAM

C279160E04

CAUTION / NOTICE / HINT

Note:

  • When replacing the skid control ECU (brake actuator assembly), perform zero point calibration.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

  1. CHECK IF SKID CONTROL ECU CONNECTOR SECURELY CONNECTED

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

      OK

      The connector is securely connected.

    Result

    Proceed to

    OK

    NG
    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  2. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication system DTCs are output.

      for LHD:Click hereClick hereClick here

      for RHD:Click hereClick hereClick here

    Result

    Proceed to

    DTC is not output

    DTC is output (for LHD)

    DTC is output (for RHD)
    DTC is output (for LHD)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is output (for RHD)

    CHECK CAN COMMUNICATION SYSTEM

    Click here

    DTC is not output

  3. INSPECT BATTERY

    1. Check the battery voltage.

      Standard voltage

      11 to 14 V

      Result

      Proceed to

      OK

      NG (for 1AD-FTV)

      NG (for 2AD-FHV)

      NG (for 2AD-FTV)

      NG (for 2AR-FE)

      NG (for 3ZR-FAE)

      NG (for 3ZR-FE)
    NG (for 1AD-FTV)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click here

    NG (for 2AD-FHV)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click here

    NG (for 2AD-FTV)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click here

    NG (for 2AR-FE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click here

    NG (for 3ZR-FAE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click hereClick here

    NG (for 3ZR-FE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    Click here

    OK

  4. CHECK TERMINAL VOLTAGE (IG1 TERMINAL)

    1. C199357C49

      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      Disconnect the A64 skid control ECU (brake actuator assembly) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      A64-34 (IG1) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG (w/o Stop and Start System)

    NG (w/ Stop and Start System)
    NG (w/o Stop and Start System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    NG (w/ Stop and Start System)

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT)

    OK

  5. CHECK HARNESS AND CONNECTOR (GND1 TERMINAL)

    1. Turn the ignition switch off.

    2. C199357C53

      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A64-1 (GND1) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)

    OK

  6. READ VALUE USING GTS (SLIP INDICATOR LIGHT)

    1. Reconnect the A64 skid control ECU (brake actuator assembly) connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    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.

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      Slip Indicator Light

      SLIP indicator light

      OFF or ON

      OFF: Indicator light off

      ON: Indicator light on

      -

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Slip Indicator Light

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

      Result

      Proceed to

      Display of the Data List remains OFF

      Display of the Data List remains ON
    Display of the Data List remains OFF

    INSPECT METER / GAUGE SYSTEM

    Click here

    Display of the Data List remains ON

    REPLACE BRAKE ACTUATOR ASSEMBLY

    Click here