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 (integration control and panel assembly) 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 message will be displayed on the multi-information display and the VSC OFF indicator light will come on.

WIRING DIAGRAM

A01W37AE95

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information Click here.

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output (See page for with Central Gateway ECU, Click here for without Central Gateway ECU).

      Result
      Result Proceed to
      DTCs are not output. A
      DTCs are output (w/ Central Gateway ECU). B
      DTCs are output (w/o Central Gateway ECU). C

    B

    INSPECT CAN COMMUNICATION SYSTEM Click here

    C

    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 BRAKE ACTUATOR ASSEMBLY CORRECTLY

    OK

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


    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, 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

      		 -

    4. Check that the indicator light and mode condition on the GTS change according to VSC OFF switch (integration control and panel assembly) operation.

      Standard
      Switch Operation Mode Condition Display

      Multi-information Display

      (TRC OFF Message)

      		 VSC OFF Indicator Light
      Not pressed Normal Not displayed Does not come on
      Pressing the VSC OFF switch (integration control and panel assembly) TRC OFF Displayed Does not come on
      Pressing and holding the VSC OFF switch (integration control and panel assembly) 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 (TR(A)C OFF MESSAGE) AND VSC OFF INDICATOR LIGHT)


    1. Select the Active Test on the GTS Click here.

      ABS/VSC/TRC
      Tester Display Measurement Item Control Range Diagnostic Note
      TRC(TRAC) OFF Indicator Light Multi-information display (TRC OFF message) Display (message) ON/OFF Can be observed on the combination meter assembly
      VSC OFF Indicator Light VSC OFF indicator light Indicator light ON/OFF Can be observed on the combination meter assembly

    2. Check the multi-information display (TRC OFF message) and VSC OFF indicator light on the combination meter assembly turn ON or OFF in accordance with the GTS operation.

      OK
      The multi-information display (TRC OFF message) and VSC OFF indicator light turn ON or OFF in accordance with the GTS operation.

    NG

    INSPECT COMBINATION METER ASSEMBLY Click here

    OK

  5. INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. A01W2OUE10
      Text in Illustration
      *a

      Component without harness connected

      (VSC OFF Switch (Integration Control and Panel Assembly))

      Turn the engine switch off.

    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
      7 (+) - 5 (E) Switch pushed Below 1 Ω
      7 (+) - 5 (E) Switch not pushed 10 kΩ or higher

    NG

    REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY Click here

    OK

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


    1. Disconnect the A40 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
      A40-33 (CSW) - H71-7 (+) Always Below 1 Ω
      A40-33 (CSW) or H71-7 (+) - 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.


    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT COMBINATION METER ASSEMBLY


    1. Turn the engine switch off.

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

    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.

      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

    INSPECT METER / GAUGE SYSTEM Click here