VEHICLE STABILITY CONTROL SYSTEM Turn Assist Indicator Light Circuit

DESCRIPTION

When any of the following conditions are met, the turn assist system becomes operable and the turn assist indicator light illuminates.


WIRING DIAGRAM

A015AOJE03

INSPECTION PROCEDURE

Note

After replacing the master cylinder solenoid, perform zero point calibration and store the system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION LINE


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

    4. Select "CAN Bus Check" from the System Selection Menu screen, and follow the prompts on the screen to inspect the CAN Bus.

      OK
      "CAN Bus Check" indicates no malfunctions in CAN communication.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  2. CHECK DTC (CAN COMMUNICATION SYSTEM)


    1. Turn the ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and the GTS on.

    4. Check for DTCs (for LHD: Click here, for RHD: Click here.

      Result
      Result Proceed to
      CAN system DTC is not output A
      CAN system DTC is output (for LHD) B
      CAN system DTC is output (for RHD) C

    B

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    C

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here

    A

  3. INSPECT TURN ASSIST FUNCTION SWITCH


    1. Remove the turn assist function switch (suspension control switch) Click here.

    2. Inspect the turn assist function switch (suspension control switch) Click here.


    NG

    REPLACE SUSPENSION CONTROL SWITCH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TURN ASSIST FUNCTION SWITCH)


    1. Turn the ignition switch off.

    2. Disconnect the A24 skid control ECU (master cylinder solenoid) connector.

    3. Disconnect the V4 turn assist function switch (suspension control switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A24-29 (EXI4) - V4-2 (OTA) Always Below 1 Ω
      A24-29 (EXI4) - Body ground Always 10 kΩ or higher
      V4-16 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI4 CIRCUIT)


    1. Turn the ignition switch off.

    2. Connect the skid control ECU (master cylinder solenoid) connector.

    3. A01563EE10
      *a

      Front view of wire harness connector

      (to Turn Assist Function Switch [Suspension Control Switch])

      Disconnect the turn assist function switch (suspension control switch) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      V4-2 (OTA) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) Click here