ANTI-LOCK BRAKE SYSTEM ABS Warning Light Remains ON

DESCRIPTION

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 is abnormal.

WIRING DIAGRAM

A01BFPDE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED


    1. Check the skid control ECU connector's connecting condition.

      OK
      The connector should be securely connected.

    NG

    CONNECT CONNECTOR TO ECU

    OK

  2. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V

    NG

    INSPECT CHARGING SYSTEM

    OK

  3. INSPECT SKID CONTROL ECU (IG1 TERMINAL VOLTAGE)


    1. A01BBRSE14

      Disconnect the skid control ECU connector.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      B19-25 (IG1) - Body ground 10 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    OK

  4. INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)


    1. A01BBRSE11

      Turn the ignition switch off.

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

      Standard resistance
      Tester Connection Specified Condition
      B19-2 (GND1) - Body ground Below 1 Ω
      B19-24 (GND2) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  5. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER ASSEMBLY)


    1. A01BFFXE07

      Disconnect the combination meter connector.

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

      Standard resistance
      Tester Connection Specified Condition
      B19-13 (WA) - H20-39 (S) Below 1 Ω
      B19-13 (WA) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT COMBINATION METER


    1. Check the combination meter Click here.

      Tech Tips

      If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part Click here.


    NG

    REPLACE COMBINATION METER ASSEMBLY

    OK

    REPLACE BRAKE ACTUATOR ASSEMBLY