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 turns off TRC and pressing and holding this switch turns off TRC and VSC. If VSC is turned off, the VSC OFF indicator light will come on.

WIRING DIAGRAM

A004HZVE08

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform VSC sensor neutral memorization Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if a CAN communication system DTC is output Click here.

      Result
      Result Proceed to
      DTC is not output. A
      DTC is 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 ECU CORRECTLY

    OK

  3. CHECK BATTERY


    1. Check the battery voltage.

      Standard Voltage
      11 to 14 V

    NG

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY Click here

    OK

  4. READ VALUE USING GTS (VSC OFF SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

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

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      TRC(TRAC)/VSC Off Mode TRC/VSC OFF mode / Normal, TRC(TRAC) OFF or VSC OFF

      Normal: Normal mode

      TRC(TRAC) OFF: TRC OFF mode

      VSC OFF: VSC OFF mode

      		 -

    4. Using the GTS, check that the switch condition displayed on the GTS changes according to VSC OFF switch operation.

      OK
      The GTS display changes according to VSC OFF switch operation.

    NG

    INSPECT VSC OFF SWITCH Click here

    OK

  5. READ VALUE USING GTS (TRACK SWITCH)


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

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      TRACK Mode TRACK mode / Normal or TRACK

      Normal: Normal mode

      TRACK: TRACK mode

      		 -

    2. Using the GTS, check that the switch condition displayed on the GTS changes according to TRACK switch operation.

      OK
      The GTS display changes according to TRACK switch operation.

    NG

    INSPECT TRACK SWITCH Click here

    OK

  6. INSPECT COMBINATION METER ASSEMBLY


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

    2. Check the combination meter assembly.

      OK
      The VSC OFF indicator and TRACK indicator lights turn 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.


    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

  7. INSPECT VSC OFF SWITCH


    1. Remove the VSC OFF switch Click here.

    2. Inspect the VSC OFF switch Click here.


    NG

    REPLACE PATTERN SELECT SWITCH ASSEMBLY Click here

    OK

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


    1. Disconnect the 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
      A5-12 (CSW1) - D35-5 Always Below 1 Ω
      A5-12 (CSW1) - Body ground Always 10 kΩ or higher
      D35-8 - 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.


    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. INSPECT TRACK SWITCH


    1. Remove the TRACK switch Click here.

    2. Inspect the TRACK switch Click here.


    NG

    REPLACE PATTERN SELECT SWITCH ASSEMBLY Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - TRACK SWITCH)


    1. Disconnect the 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
      A5-9 (CSW2) - D35-1 Always Below 1 Ω
      A5-9 (CSW2) - Body ground Always 10 kΩ or higher
      D35-8 - 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.


    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR