VEHICLE STABILITY CONTROL SYSTEM VSC OFF Switch Circuit

DESCRIPTION

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

Pressing the VSC OFF switch turns off TRC operation, and pressing and holding this switch turns off TRC and VSC operation. If TRC and VSC operations are turned off, "Traction Control Turned Off" will be displayed on the multi-information display and the VSC OFF indicator light will come on.

WIRING DIAGRAM

B006XS3E05

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

Click here

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

      Click here

      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK IF BRAKE ACTUATOR ASSEMBLY CONNECTOR IS 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 BRAKE ACTUATOR ASSEMBLY CORRECTLY

    OK

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


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


      Chassis > ABS/VSC/TRC > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      TRC/VSC Off Mode TRC/VSC off mode Normal, TRC OFF, VSC Expert Mode or VSC OFF

      Normal: Normal mode

      TRC OFF: TRC off mode

      VSC Expert Mode: VSC expert mode

      VSC OFF: VSC off mode

      		 -

      Chassis > ABS/VSC/TRC > Data List
      Tester Display
      TRC/VSC Off Mode

    2. Check the indicator light and mode condition on the GTS changes according to VSC OFF switch operation.

      Standard
      Switch Operation Mode Condition Display Multi-information Display ("Traction Control Turned Off") VSC OFF Indicator Light
      Not pressed Normal Not displayed Does not come on
      Pressing the VSC OFF switch TRC OFF Displayed Does not come on
      Pressing and holding the VSC OFF switch VSC OFF Displayed Comes on
      Result
      Result Proceed to
      Indicator light and mode condition display do not change A
      Mode condition display is normal, but indicator light does not change B
      Indicator light and mode condition display are normal C

    B

    INSPECT METER / GAUGE SYSTEM Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

  4. PERFORM ACTIVE TEST USING GTS (MULTI-INFORMATION DISPLAY (TRACTION CONTROL TURNED OFF) AND VSC OFF INDICATOR LIGHT)


    1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.


      Chassis > ABS/VSC/TRC > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      TRC(TRAC) OFF Indicator Light Multi-information display (Traction Control Turned Off) Display OFF/ON Observe combination meter assembly
      VSC OFF Indicator Light VSC OFF indicator light Indicator light OFF/ON Observe combination meter assembly

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      TRC(TRAC) OFF Indicator Light

      Chassis > ABS/VSC/TRC > Active Test
      Tester Display
      VSC OFF Indicator Light

    2. Check that "Traction Control Turned Off" on the multi-information display and the VSC OFF indicator light on the combination meter assembly turn on or off in accordance with the operation of the GTS.

      OK
      "Traction Control Turned Off" on the multi-information display and the VSC OFF indicator light turn on or off in accordance with the operation of the GTS.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT COMBINATION METER ASSEMBLY Click here

    OK

  5. INSPECT VSC OFF SWITCH


    1. Turn the ignition switch off.

    2. B0071DOC01
      *a

      Component without harness connected

      (VSC OFF switch)

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    3. Disconnect the K39 VSC OFF switch connector.

    4. Check both the connector case and the terminal for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      5 (+) - 2 (E) Switch pushed Below 1 Ω
      5 (+) - 2 (E) Switch not pushed 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE VSC OFF SWITCH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - VSC OFF SWITCH)


    1. Make sure that there is no looseness at the locking part and the connecting part of the connector.

      OK
      The connector is securely connected.

    2. Disconnect the A34 skid control ECU (brake actuator assembly) connector.

    3. Check both the connector case and the terminals for deformation and corrosion.

      OK
      No deformation or corrosion.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A34-6 (CSW) - K39-5 (+) Always Below 1 Ω
      A34-6 (CSW) or K39-5 (+) - Body ground Always 10 kΩ or higher
      K39-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT COMBINATION METER ASSEMBLY


    1. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    2. Perform the Active Test of the combination meter assembly using the GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display
      Multi Display All (White)

      Body Electrical > Combination Meter > Active Test
      Tester Display
      VSC OFF Indicator

    3. Check the combination meter assembly.

      OK
      The multi-information display and VSC OFF indicator light turn on or off in accordance with GTS operation.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY for LHD: Click here
    REPLACE BRAKE ACTUATOR ASSEMBLY for RHD: Click here

    NG

    INSPECT METER / GAUGE SYSTEM Click here