VEHICLE STABILITY CONTROL SYSTEM(for TMC Made) ABS Warning Light Remains ON

DESCRIPTION

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

If any of the following is detected, the ABS warning light remains on:


Tech Tips

In some cases, the intelligent tester cannot be used when the skid control ECU (brake actuator assembly) is abnormal.

WIRING DIAGRAM

A01VLCNE03

CAUTION / NOTICE / HINT

Note


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

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED


    1. Check if the skid control ECU connector is securely connected.

      OK
      The connector is securely connected.

    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  2. CHECK CAN COMMUNICATION SYSTEM


    1. Check if CAN communication system DTCs are output Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    CHECK CAN COMMUNICATION SYSTEM Click here

    A

  3. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (for 1KR-FE) B
      NG (for 1NR-FE) C

    B

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    C

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    A

  4. CHECK TERMINAL VOLTAGE (IG1 TERMINAL)


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

    2. Turn the ignition switch to ON.

    3. A01VHP0E01
      Text in Illustration
      *A except LHD with CVT
      *B for LHD with CVT
      *a

      Front view of wire harness connector

      (to Skid control ECU)

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

      Standard Voltage (except LHD with CVT)
      Tester Connection Switch Condition Specified Condition
      A54-34 (IG1) - Body ground Ignition switch ON 11 to 14 V
      Standard Voltage (for LHD with CVT)
      Tester Connection Switch Condition Specified Condition
      A56-34 (IG1) - Body ground Ignition switch ON 11 to 14 V
      Result
      Result Proceed to
      OK A
      NG (w/o Stop and Start System) B
      NG (w/ Stop and Start System) C

    4. Turn the ignition switch off.


    B

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    C

    GO TO STOP AND START SYSTEM Click here

    A

  5. CHECK HARNESS AND CONNECTOR (GND1 TERMINAL)


    1. A01VL4JE01
      Text in Illustration
      *A except LHD with CVT
      *B for LHD with CVT
      *a

      Front view of wire harness connector

      (to Skid control ECU)

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

      Standard Resistance (except LHD with CVT)
      Tester Connection Condition Specified Condition
      A54-1 (GND1) - Body ground Always Below 1 Ω
      Standard Resistance (for LHD with CVT)
      Tester Connection Condition Specified Condition
      A56-1 (GND1) - Body ground Always Below 1 Ω

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


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

    OK

  6. READ VALUE USING INTELLIGENT TESTER (ABS WARNING LIGHT)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

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

    5. According to the display on the tester, read the Data List.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ABS Warning Light ABS warning light / ON or OFF OFF -

    6. When performing the ABS Warning Light Active Test, check ABS Warning Light in the Data List.

      ABS/VSC/TRC
      Tester Display Test Part Control Range Diagnostic Note
      ABS Warning Light ABS warning light Warning light ON/OFF Observe the combination meter.
      Result
      Result Proceed to
      Data List Display Data List Display when Performing Active Test ON/OFF Operation
      ON Changes between ON and OFF A
      Does not change between ON and OFF (for LHD) B
      Does not change between ON and OFF (for RHD) C
      OFF Changes between ON and OFF A
      Does not change between ON and OFF (for LHD) B
      Does not change between ON and OFF (for RHD) C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

  7. REPLACE COMBINATION METER ASSEMBLY


    1. Turn the ignition switch off.

    2. Replace the combination meter assembly Click here.


    NEXT

  8. CHECK COMBINATION METER ASSEMBLY


    1. Connect the intelligent tester to the DLC3.

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

      OK
      The ABS warning light turns on or off in accordance with the intelligent tester.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here