ANTI-LOCK BRAKE SYSTEM DIAGNOSIS SYSTEM


  1. DIAGNOSIS

    A01391IE01

    If the skid control ECU detects a malfunction, the ABS and/or BRAKE warning lights come on in accordance with the trouble area, to warn the driver.

    The table below indicates which lights come on when there are malfunctions in particular functions.

    Indicator / Trouble Area ABS System EBD System Skid Control ECU
    ABS warning light ○ ○ ○
    Brake warning light - ○ ○

    ○: Light ON, -: Light OFF

    Tech Tips


    • The DTCs can be read by connecting SST (09843-18043) between the TC and CG terminals of DLC3 and observing the blinking of the ABS warning light, or by connecting an intelligent tester Click here.

    • This system has a sensor signal check function Click here.

  2. WARNING LIGHT CHECK


    1. Release the parking brake lever.

      Note

      Before releasing the parking brake lever, set chocks to hold the vehicle for safety.

      Tech Tips

      When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.

    2. A01391IE01

      When the ignition switch is turned on, check that the ABS warning light and brake warning light come on and go off in about 3 seconds.

      Tech Tips

      If the warning lights do not illuminate, confirm whether the bulbs have burned out, and also check the wire harness between the skid control ECU and the combination meter.

      If the warning light remains on, troubleshoot the related light circuit by proceeding to the page indicated below:

      Trouble areas See page
      ABS warning light circuit

      Click here

      Brake warning light circuit

      Click here

  3. INITIAL CHECK

    The initial check commences automatically when the vehicle speed exceeds 4 km/h (3 mph) after the ignition switch has been turned on.

    Operation inspections of the solenoids, motor and relay of the brake actuator are performed during the initial check. If problems are found, the ABS warning light comes on and DTCs are stored.

    Tech Tips

    Utilize the initial check on occasions such as symptom tests for detected DTCs and confirmation after completion of repairs.