VEHICLE STABILITY CONTROL SYSTEM VSC OFF Indicator Light Remains ON

DESCRIPTION

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

for 4WD:

When the transfer position is L4, VSC is prohibited and the VSC OFF indicator light turns on.

w/ Rear Differential Lock:

When the rear differential is locked, VSC is prohibited, and the VSC OFF and TRC OFF indicator lights turn on.

WIRING DIAGRAM

A01DXHME04

INSPECTION PROCEDURE

Note


  • for 4WD:

    As there may be malfunctions in the transfer system related to when the transfer operates in L4, check the transfer system first Click here.

  • After replacing the brake actuator assembly, perform calibration Click here.

  • Before disconnecting the connector, make sure that there are no problems with the connection.

  • After disconnecting the connector, make sure that the connector case and terminals are not deformed or corroded.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (TRC/VSC OFF MODE)


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester 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, Unknown, 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 operation.

      OK
      The intelligent tester display changes according to VSC OFF switch operation.

    NG

    INSPECT VSC OFF SWITCH Click here

    OK

  2. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. Turn the ignition switch off.

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

    3. Turn the ignition switch to ON.

    4. Check the state of the VSC OFF indicator light.

      Result
      Result Proceed to
      VSC OFF indicator light turns off for LHD A
      for RHD B
      VSC OFF indicator light does not turn off C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER) Click here

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  3. INSPECT VSC OFF SWITCH


    1. Turn the ignition switch off.

    2. Remove the VSC OFF switch Click here.

    3. Inspect the VSC OFF switch Click here.


    NG

    REPLACE VSC OFF SWITCH Click here

    OK

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


    1. Turn the ignition switch off.

    2. Disconnect the VSC OFF switch connector.

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-30 (CSW) - V8-3 Always Below 1 Ω
      S35-30 (CSW) - Body ground Always 10 kΩ or higher
      V8-4 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK TERMINAL VOLTAGE (EXI3 TERMINAL)


    1. A01DW3AE62
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

      Turn the ignition switch off.

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      S35-28 (EXI3) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      NG w/ Rear Differential Lock A
      w/o Rear Differential Lock B
      OK for LHD C
      for RHD D

    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    D

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  6. CHECK HARNESS AND CONNECTOR (EXI3 TERMINAL CIRCUIT)


    1. Turn the ignition switch off.

    2. Disconnect the rear differential lock position switch (No. 4 transfer indicator switch) connector.

    3. Disconnect the rear differential lock ECU (No. 2 4 wheel drive control ECU) connector.

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

    5. Disconnect the C26 combination meter connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-28 (EXI3) - T31-2 Always Below 1 Ω
      S35-28 (EXI3) - C26-9 Always Below 1 Ω
      S35-28 (EXI3) - F23-1 (RLP) Always Below 1 Ω
      S35-28 (EXI3) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT DIFFERENTIAL LOCK SYSTEM


    1. Inspect rear differential lock system Click here.


    NG

    GO TO DIFFERENTIAL LOCK SYSTEM (PROBLEM SYMPTOMS TABLE) Click here

    OK

  8. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)


    1. Turn the ignition switch off.

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

    3. Disconnect the C26 combination meter connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-15 (VSCW) - C26-16 Always Below 1 Ω
      S35-15 (VSCW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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