VEHICLE STABILITY CONTROL SYSTEM VSC OFF Indicator Light Remains ON

DESCRIPTION

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

Pressing the VSC OFF switch (integration control and panel assembly) turns off TRC operation and pressing and holding this switch turns off TRC and VSC operation. If VSC operation is turned off, the VSC OFF indicator light will come on.

WIRING DIAGRAM

A01G4ZWE01

INSPECTION PROCEDURE

Note

When replacing the skid control ECU (brake actuator assembly), perform 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.

    NG

    CONNECT CONNECTOR TO ACTUATOR CORRECTLY

    OK

  3. CHECK BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for 2AR-FE) B
      NG (for 2GR-FE) C

    B

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY Click here

    C

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY Click here

    A

  4. READ VALUE USING GTS (VSC OFF SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Select the Data List using the GTS Click here.

      ABS/VSC/TRC
      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

      		 -

    4. Using the GTS, check that the switch condition displayed on the GTS changes according to VSC OFF switch (integration control and panel assembly) operation.

      OK
      The GTS display changes according to VSC OFF switch (integration control and panel assembly) operation.

    NG

    INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    OK

  5. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

    2. Perform an Active Test of the combination meter assembly (meter CPU) using the GTS Click here.

    3. Check the combination meter assembly.

      OK
      The VSC OFF indicator light turns on or off in accordance with the Active Test operation.

      Tech Tips

      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 here.


    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  6. INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. Turn the engine switch off.

    2. Inspect the VSC OFF switch (integration control and panel assembly) Click here for U660E, or Click here for U760E).

      OK
      The VSC OFF switch (integration control and panel assembly) is normal.
      Result
      Result Proceed to
      OK A
      NG (for U660E) B
      NG (for U760E) C

    B

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    C

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    A

  7. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - INTEGRATION CONTROL AND PANEL ASSEMBLY)


    1. Disconnect the A40 skid control ECU (brake actuator assembly) connector.

    2. Disconnect the H71 VSC OFF switch (integration control and panel assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A40-30 (CSW) - H71-7 (+) Always Below 1 Ω
      A40-30 (CSW) - Body ground Always 10 kΩ or higher
      H71-5 (E) - Body ground Always Below 1 Ω

      Tech Tips

      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 here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here