VEHICLE STABILITY CONTROL SYSTEM TRC OFF Indicator Light Remains ON

DESCRIPTION

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

Pressing the VSC OFF switch (integration control and panel assembly) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns off, the TRC OFF message is displayed on the multi-information display.

When there is a malfunction in the engine control system, "TRC OFF" is displayed on the multi-information display in the combination meter and TRC operation stops.

WIRING DIAGRAM

A01FDFVE01

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output (for LHD: Click here, for RHD: Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      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

  2. CHECK DTC (ENGINE CONTROL SYSTEM)


    1. Check for DTCs (for 2GR-FSE: Click here, for 4GR-FSE: Click here.

      Result
      Result Proceed to
      DTC not output A
      DTC output (for 2GR-FSE) B
      DTC output (for 4GR-FSE) C

    B

    GO TO ENGINE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    C

    GO TO ENGINE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    A

  3. INSPECT VSC OFF SWITCH


    1. Remove the VSC OFF switch (integration control and panel assembly) Click here.

    2. Inspect the VSC OFF switch (integration control and panel assembly) Click here.


    NG

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - VSC OFF SWITCH)


    1. Turn the engine switch off.

    2. Disconnect the A13 skid control ECU (brake actuator assembly) connector.

    3. Disconnect the N6 VSC OFF switch (integration control and panel assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A13-30 (CSW) - N6-15 (+) Always Below 1 Ω
      A13-30 (CSW) - Body ground Always 10 kΩ or higher
      N6-8 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. READ VALUE USING GTS (TRC/VSC OFF MODE)


    1. Turn the engine switch off.

    2. Connect the GTS to the DLC3.

    3. Start the engine.

    4. Turn the GTS on.

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

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      TRC/VSC Off Mode VSC OFF switch / Normal, TRC OFF or VSC OFF

      Normal: Normal mode

      TRC OFF: TRC OFF mode

      VSC OFF: VSC OFF mode

      		 -

    6. Check that the mode display changes according to VSC OFF switch (integration control and panel assembly) operation.

      OK
      Display changes according to switch operation.

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

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