VEHICLE STABILITY CONTROL SYSTEM TRC OFF Indicator Light Remains ON

DTC Code DTC Name
TRC 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 TRC/TRAC OFF indicator light is illuminated when the TRC/TRAC control is prohibited by operating the VSC OFF switch (telltale light assembly).

By pressing the VSC OFF switch (telltale light assembly) for a short time, the TRC/TRAC OFF mode is activated, and the TRC/TRAC control is prohibited, and the TRC/TRAC OFF indicator light in the combination meter is illuminated.

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 are illuminated.

If there is a malfunction in the SFI system, the TRC/TRAC system will be prohibited and the TRC/TRAC OFF indicator light will turn on (for 2AR-FE, 3ZR-FE).

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.

TRC OFF is displayed on the multi-information display when the TRC control is prohibited by operating the VSC OFF switch (telltale light assembly).

By pressing the VSC OFF switch (telltale light assembly) for a short time, the TRC OFF mode is activated, TRC control is prohibited, and TRC OFF is displayed on the multi-information display.

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.

If there is a malfunction in the SFI system, the TRC system will be prohibited and the TRC OFF will be displayed on the multi-information display (for 2AR-FE, 3ZR-FE, 3ZR-FAE).

WIRING DIAGRAM

C342523E02

CAUTION / NOTICE / HINT

Note:

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

Click here

PROCEDURE

  1. CHECK ENGINE TYPE

    1. Check the engine type.

      Result

      Result

      Proceed to

      2AR-FE

      A

      3ZR-FAE

      3ZR-FE

      2AD-FHV

      B

      2AD-FTV

      2WW
    B

    CHECK IF SKID CONTROL ECU CONNECTOR SECURELY CONNECTEDClick here

    A

  2. CHECK SFI SYSTEM

    1. Check if SFI system DTCs are output

      for 2AR-FE (w/ Canister Pump Module):Click here

      for 2AR-FE (w/o Canister Pump Module):Click here

      for 3ZR-FAE:Click here

      for 3ZR-FE (for K111, K111F):Click here

      for 3ZR-FE (except K111, K111F):Click here

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Proceed to

      DTCs are not output

      DTCs are output (for 2AR-FE (w/ Canister Pump Module))

      DTCs are output (for 2AR-FE (w/o Canister Pump Module))

      DTCs are output (for 3ZR-FAE)

      DTCs are output (for K111, K111F)

      DTCs are output (except K111, K111F)
    DTCs are output (for 2AR-FE (w/ Canister Pump Module))

    CHECK SFI SYSTEM

    Click here

    DTCs are output (for 2AR-FE (w/o Canister Pump Module))

    CHECK SFI SYSTEM

    Click here

    DTCs are output (for 3ZR-FAE)

    CHECK SFI SYSTEM

    Click here

    DTCs are output (for K111, K111F)

    CHECK SFI SYSTEM

    Click here

    DTCs are output (except K111, K111F)

    CHECK SFI SYSTEM

    Click here

    DTCs are not output

  3. CHECK IF SKID CONTROL ECU CONNECTOR 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

  4. 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

  5. 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

  6. CHECK HARNESS AND CONNECTOR (CSW TERMINAL)

    1. Turn the ignition switch off.

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

    3. C342353C31

      *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 ASSEMBLYClick here

    OK

  7. 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

  8. 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

  9. 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