VEHICLE STABILITY CONTROL SYSTEM ABS Warning Light Remains ON

DTC Code DTC Name
ABS Warning Light Remains ON

DESCRIPTION

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

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

  • The skid control ECU (brake actuator assembly) connector is disconnected from the skid control ECU (brake actuator assembly).

  • There is a malfunction in the skid control ECU (brake actuator assembly) internal circuit.

  • There is an open in the harness between the combination meter and skid control ECU (brake actuator assembly).

  • The ABS and/or BA is defective.

Tip:

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

WIRING DIAGRAM

C323091E02

CAUTION / NOTICE / HINT

Note:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration (Click here).

PROCEDURE

  1. CHECK CAN COMMUNICATION SYSTEM

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

      Result

      Result

      Proceed to

      DTCs are not output.

      A

      DTCs are output.

      B

    INSPECT CAN COMMUNICATION SYSTEM

    (Click here)

  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.

    CONNECT CONNECTOR TO BRAKE ACTUATOR ASSEMBLY CORRECTLY

  3. CHECK BATTERY

    Click here

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY

    (Click here)

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY

    (Click here)

    CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY

    (Click here)

  4. CHECK TERMINAL VOLTAGE (POWER SOURCE TERMINAL)

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (+BS CIRCUIT)

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT)

    (Click here)

  5. CHECK HARNESS AND CONNECTOR (GND1 TERMINAL)

    Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)

  6. READ VALUE USING GTS (ABS WARNING LIGHT)

    1. Reconnect the A78 (for CVT) or A79 (except CVT) skid control ECU (brake actuator assembly) connector.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON.

    4. Select the Data List on the GTS (Click here).

      Table 1. ABS/VSC/TRC

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      ABS Warning Light

      ABS warning light/ ON or OFF

      ON: Warning light on

      OFF: Warning light off

      -

    5. Check the GTS display condition of the ABS warning light.

      Result

      Result

      Proceed to

      Display of the Data List remains ON.

      A

      Display of the Data List remains OFF.

      B

    REPLACE BRAKE ACTUATOR ASSEMBLY

    (Click here)

    INSPECT METER / GAUGE SYSTEM

    (Click here)