VEHICLE STABILITY CONTROL SYSTEM VSC OFF Switch Circuit

DTC Code DTC Name
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, the TRC OFF indicator light and the VSC OFF indicator light will come on.

WIRING DIAGRAM

C270525E36

CAUTION / NOTICE / HINT

Note:

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

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PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

    1. Check if CAN communication system DTCs are output.

      Click hereClick hereClick here

    Result

    Result

    Proceed to

    DTCs are not output.

    A

    DTCs are output.

    B
    B

    INSPECT CAN COMMUNICATION SYSTEM

    Click hereClick 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. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Select the Data List using the GTS.

      Click hereClick hereClick here

      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, Unknown or VSC OFF

      Normal: Normal mode

      TRC OFF: TRC off mode

      Unknown: Unspecified

      VSC OFF: VSC off mode

      -

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      TRC/VSC Off Mode

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

      Standard

      Switch Operation

      Mode Condition Display

      TRC OFF Indicator Light

      VSC OFF Indicator Light

      Not pressed

      Normal

      Does not come on

      Does not come on

      Pressing the VSC OFF switch

      TRC OFF

      Comes on

      Does not come on

      Pressing and holding the VSC OFF switch

      VSC OFF

      Comes on

      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 is normal.

    C
    B

    INSPECT METER / GAUGE SYSTEM

    Click here

    C

    USE SIMULATION METHOD TO CHECK

    Click hereClick hereClick here

    A

  4. PERFORM ACTIVE TEST USING GTS (TRC OFF INDICATOR LIGHT AND VSC OFF INDICATOR LIGHT)

    1. Select the Active Test on the GTS.

      Click hereClick hereClick here

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display

      Measurement Item

      Control Range

      Diagnostic Note

      TRC(TRAC) OFF Indicator Light

      TRC OFF indicator light

      Indicator light ON/OFF

      Observe combination meter assembly

      VSC OFF Indicator Light

      VSC OFF indicator light

      Indicator light ON/OFF

      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 the TRC OFF indicator light and VSC OFF indicator light in the combination meter assembly turn on or off in accordance with GTS operation.

      OK

      The TRC OFF indicator light and VSC OFF indicator light turn on or off in accordance with GTS operation.

    Result

    Proceed to

    OK

    NG
    NG

    INSPECT COMBINATION METER ASSEMBLYClick here

    OK

  5. INSPECT VSC OFF SWITCH

    1. C239020C04

      *a

      Component without harness connected

      (VSC OFF Switch)

      Turn the ignition switch off.

    2. Disconnect the E7 VSC OFF switch connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      6 (+) - 3 (E)

      Switch pushed

      Below 1 Ω

      6 (+) - 3 (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. Disconnect the A39 skid control ECU (brake actuator assembly) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A39-9 (CSW) - E7-6 (+)

      Always

      Below 1 Ω

      A39-9 (CSW) or E7-6 (+) - Body ground

      Always

      10 kΩ or higher

      E7-3 (E) - Body ground

      Always

      Below 1 Ω
      Tip:

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

      Click hereClick here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY

    Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT COMBINATION METER ASSEMBLY

    1. Turn the ignition switch off.

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

      Click hereClick hereClick here

      Body Electrical > Combination Meter > Active Test

      Tester Display

      VSC TRC Indicator

      Body Electrical > Combination Meter > Active Test

      Tester Display

      Indicat. VSC OFF

    3. Check the combination meter assembly.

      OK

      The TRC OFF indicator light and VSC OFF indicator light turn on or off in accordance with GTS operation.

      Tip:

      If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts.

      Click hereClick here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY

    Click hereClick here

    NG

    INSPECT METER / GAUGE SYSTEM

    Click here