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.

for Segment Display Type:

Pressing the VSC OFF switch (telltale light assembly) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns OFF, the TRC/TRAC OFF indicator light will come on.

If VSC and traction control turns OFF, the TRC/TRAC OFF indicator and VSC OFF indicator light will come on.

The VSC OFF indicator light is illuminated when the VSC and TRC/TRAC controls are prohibited by operating the VSC OFF switch (telltale light assembly).

By pressing the VSC OFF switch (telltale light assembly) for 3 seconds or more, the VSC OFF mode is activated, the VSC and TRC/TRAC controls are prohibited, and both the VSC OFF indicator light and the TRC/TRAC OFF indicator light in the combination meter are illuminated.

for TFT Display Type:

Pressing the VSC OFF switch (telltale light assembly) turns off traction control and pressing and holding this switch turns off traction and VSC controls. If traction control turns OFF, TRC OFF is displayed on the multi-information display.

If VSC and traction control turns OFF, TRC OFF is displayed on the multi-information display and the VSC OFF indicator light will come on.

The VSC OFF indicator light is illuminated when the VSC and TRC controls are prohibited by operating the VSC OFF switch (telltale light assembly).

By pressing the VSC OFF switch (telltale light assembly) for 3 seconds or more, the VSC OFF mode is activated, VSC and TRC controls are prohibited, the VSC OFF indicator light illuminates and TRC OFF is displayed on the multi-information display.

WIRING DIAGRAM

A01QUN1E02

CAUTION / NOTICE / HINT

Note

When replacing the brake actuator assembly, perform zero point calibration.

Click here

PROCEDURE


  1. CHECK IF SKID CONTROL ECU 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 ECU CORRECTLY

    OK

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output.

      for LHD with Central Gateway ECU: Click here

      for RHD with Central Gateway ECU: Click here

      for LHD without Central Gateway ECU: Click here

      for RHD without Central Gateway ECU: Click here

      Result
      Proceed to
      DTC is not output
      DTC is output (for LHD with Central Gateway ECU)
      DTC is output (for RHD with Central Gateway ECU)
      DTC is output (for LHD without Central Gateway ECU)
      DTC is output (for RHD without Central Gateway ECU)

    DTC is output (for LHD with Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM Click here

    DTC is output (for RHD with Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM Click here

    DTC is output (for LHD without Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM Click here

    DTC is output (for RHD without Central Gateway ECU)

    CHECK CAN COMMUNICATION SYSTEM Click here

    DTC is not output

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Proceed to
      OK
      NG (for 2AD-FHV)
      NG (for 2AD-FTV)
      NG (for 2AR-FE)
      NG (for 3ZR-FAE)
      NG (for 3ZR-FE)
      NG (for 2WW)

    NG (for 2AD-FHV)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    NG (for 2AD-FTV)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    NG (for 2AR-FE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    NG (for 3ZR-FAE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    NG (for 3ZR-FE)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    NG (for 2WW)

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (CSW TERMINAL)


    1. Turn the ignition switch off.

    2. Disconnect the A80 skid control ECU (brake actuator assembly) connector.

    3. A01QPOVC31
      *a

      Front view of wire harness connector

      (to Skid Control ECU [Brake Actuator Assembly])

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A80-33 (CSW) - Body ground VSC OFF switch (telltale light assembly) held on Below 1 Ω
      VSC OFF switch (telltale light assembly) off (Not pressed) 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT TELLTALE LIGHT ASSEMBLY Click here

    OK

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


    1. Reconnect the A80 skid control ECU (brake actuator assembly) connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the GTS on.

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

    6. According to the display on the GTS, read the Data List.


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

      Normal: Normal mode

      TRC OFF: TRC/TRAC off mode

      VSC OFF: VSC off mode

      		 -

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

    7. Check that the mode display changes according to the VSC OFF switch (telltale light assembly) operation.

      OK
      Display changes according to the switch operation.
      Result
      Proceed to
      OK
      NG

    OK

    INSPECT METER / GAUGE SYSTEM Click here

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

  6. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the VSC OFF switch (telltale light assembly).

      Click here

    2. Inspect the VSC OFF switch (telltale light assembly).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - TELLTALE LIGHT ASSEMBLY)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A80-33 (CSW) - G43-6 (+) Always Below 1 Ω
      G43-13 (E) - Body ground Always Below 1 Ω
      A80-33 (CSW) or G43-6 (+) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR