VEHICLE STABILITY CONTROL SYSTEM VSC OFF Indicator Light does not Come ON

DESCRIPTION

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

Pressing the VSC OFF switch turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns OFF, the TRC OFF indicator light will come on.

If VSC and traction control turns OFF, the TRC OFF indicator and VSC OFF indicator light will come on.

The VSC OFF indicator light is illuminated when the VSC and TRC controls are prohibited by operating the VSC OFF switch.

By pressing the VSC OFF switch for 3 seconds or longer, the VSC OFF mode is activated, the VSC and TRC controls are prohibited, and both the VSC OFF indicator light and the TRC OFF indicator light in the combination meter are illuminated.

WIRING DIAGRAM

Refer to TRC OFF Indicator Light Remains ON Click here.

CAUTION / NOTICE / HINT

Note


  • When replacing the brake actuator assembly (skid control ECU) 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 CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    CHECK CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK HARNESS AND CONNECTOR (CSW)


    1. Turn the ignition switch off.

    2. A005JCYE01
      Text in Illustration
      *A except LHD with CVT
      *B for LHD with CVT
      *a

      Front view of wire harness connector

      (to brake actuator assembly (skid control ECU) control ECU (Brake actuator assembly))

      Disconnect the A54 or A56 brake actuator assembly (skid control ECU) control ECU (brake actuator assembly) connector.

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

      Standard Resistance
      except LHD with CVT
      Tester Connection Switch Condition Specified Condition
      A54-30 (CSW) - Body ground VSC OFF Switch held ON Below 1 Ω
      A54-30 (CSW) - Body ground VSC OFF Switch OFF (Not pressed) 10 kΩ or higher
      for LHD with CVT
      Tester Connection Switch Condition Specified Condition
      A56-30 (CSW) - Body ground VSC OFF Switch held ON Below 1 Ω
      A56-30 (CSW) - Body ground VSC OFF Switch OFF (Not pressed) 10 kΩ or higher

    4. Reconnect the A54 or A56 brake actuator assembly (skid control ECU) control ECU (brake actuator assembly) connector.


    NG

    INSPECT VSC OFF SWITCH Click here

    OK

  3. INSPECT COMBINATION METER ASSEMBLY


    1. Connect the intelligent tester to the DLC3.

    2. Perform Active Test of the combination meter using the intelligent tester Click here.

      OK
      The VSC OFF indicator light turns on or off in accordance with the intelligent tester.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here

  4. INSPECT VSC OFF SWITCH


    1. Remove the VSC OFF switch Click here.

    2. Inspect the VSC OFF switch Click here.

    3. Reconnect the VSC OFF switch connector.


    NG

    REPLACE VSC OFF SWITCH Click here

    OK

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


    1. Disconnect the A54 or A56 brake actuator assembly (skid control ECU) control ECU (brake actuator assembly) connector and the F57 VSC OFF switch connector.

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

      Standard Resistance (Check for Open)
      except LHD with CVT
      Tester Connection Condition Specified Condition
      A54-30 (CSW) - F57-6 Always Below 1 Ω
      F57-3 - Body ground Always Below 1 Ω
      for LHD with CVT
      Tester Connection Condition Specified Condition
      A56-30 (CSW) - F57-6 Always Below 1 Ω
      F57-3 - Body ground Always Below 1 Ω
      Standard Resistance (Check for Short)
      except LHD with CVT
      Tester Connection Condition Specified Condition
      A54-30 (CSW) - Body ground Always 10 kΩ or higher
      for LHD with CVT
      Tester Connection Condition Specified Condition
      A56-30 (CSW) - Body ground Always 10 kΩ or higher

    3. Reconnect the A54 or A56 brake actuator assembly (skid control ECU) connector and the VSC OFF switch connector.


    OK

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR