VEHICLE STABILITY CONTROL SYSTEM ABS Warning Light Remains ON

DTC Code DTC Name
ABS Warning Light Remains ON

DESCRIPTION

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

  • The skid control ECU connector is disconnected from the skid control ECU.

  • There is a malfunction in the skid control ECU internal circuit.

  • There is an open in the harness between the combination meter and skid control ECU.

  • The anti-lock brake system is defective.

  • The voltage at terminal IG1 is high.

Tip:

It may not be possible to use the intelligent tester when the skid control ECU is abnormal.

WIRING DIAGRAM

C220883E02

CAUTION / NOTICE / HINT

Note:

When replacing the master cylinder solenoid, perform calibration (Click here).

PROCEDURE

  1. CHECK THAT SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

    1. Check the skid control ECU connector connection.

      OK

      The 2 connectors are securely connected.

      Result

      Result

      OK

      NG
    NG

    CONNECT CONNECTOR TO ECU CORRECTLY

    OK

  2. CHECK DTC

    1. Check for DTCs.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTC is not output

      A

      DTC is output

      B
    B

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

    Click hereClick here

    A

  3. CHECK CAN COMMUNICATION LINE

    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

    5. Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus.

      Click hereClick here

      CAN Bus Check

      OK

      CAN Bus Check indicates no malfunctions in CAN communication.

      Result

      Result

      OK

      NG
    NG

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    OK

  4. READ VALUE USING INTELLIGENT TESTER (IG1 VOLTAGE VALUE)

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Start the engine.

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

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      IG1 Voltage Value

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      IG1 Voltage Value

      IG1 voltage value

      Min.: 0.00 V, Max.: 20.00 V

      Engine switch on (IG): 11 to 14 V

      -

    6. Check the voltage output from the skid control ECU displayed on the intelligent tester.

      OK

      The output voltage displayed on the intelligent tester is within 11 to 14 V.

      Result

      Result

      OK

      NG
    NG

    CHECK TERMINAL VOLTAGE (IG1)Click here

    OK

  5. CHECK TERMINAL VOLTAGE (EXI3)

    1. Disconnect the A7 skid control ECU connector.

    2. C214161C07

      *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

      Tester Connection

      Switch Condition

      Specified Condition

      A7-40 (EXI3) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI3 CIRCUIT)Click here

    OK

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

    1. Turn the engine switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the engine switch on (IG).

    4. Turn the intelligent tester on.

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

      Chassis > ABS/VSC/TRC > Data List

      Tester Display

      ABS Warning Light

      Chassis > ABS/VSC/TRC > Data List

      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.

      Click hereClick here

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display

      ABS Warning Light

      Chassis > ABS/VSC/TRC > Active Test

      Tester Display

      Measurement Item

      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

      B

      OFF

      Changes between ON and OFF

      A

      Does not change between ON and OFF

      B
    A

    GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    Click here

    B

    REPLACE MASTER CYLINDER SOLENOID

    Click here

  7. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU EXI3 CIRCUIT)

    1. Disconnect the A7 skid control ECU connector.

    2. Disconnect the G41 four wheel drive control ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A7-40 (EXI3) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK TERMINAL VOLTAGE (EXI3)

    1. Disconnect the A7 skid control ECU connector.

    2. C214161C07

      *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

      Tester Connection

      Switch Condition

      Specified Condition

      A7-40 (EXI3) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    OK

    REPLACE MASTER CYLINDER SOLENOID

    Click here

    NG

    REPLACE 4 WHEEL DRIVE CONTROL ECU

    Click here

  9. CHECK TERMINAL VOLTAGE (IG1)

    1. Disconnect the A7 skid control ECU connector.

    2. C214161C02

      *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

      Tester Connection

      Switch Condition

      Specified Condition

      A7-46 (IG1) - Body ground

      Engine switch on (IG)

      11 to 14 V

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (GND1, GND2, AND GND3 TERMINAL)

    1. Disconnect the A7 and A8 skid control ECU connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A7-1 (GND1) - Body ground

      Always

      Below 1 Ω

      A7-32 (GND2) - Body ground

      Always

      Below 1 Ω

      A8-4 (GND3) - Body ground

      Always

      Below 1 Ω

      Result

      Result

      OK

      NG
    OK

    REPLACE MASTER CYLINDER SOLENOID

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR