ANTI-LOCK BRAKE SYSTEM DIAGNOSIS SYSTEM


  1. DESCRIPTION

    When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the skid control ECU.

    The skid control ECU stores DTCs when the ECU detects a malfunction in the ECU itself or in its circuits.

    To check the DTCs, connect the intelligent tester to the DLC3 on the vehicle. The intelligent tester enables you to clear the DTCs, activate the various actuators, and check the Freeze Frame Data and Data List.


    1. Check the battery voltage.

      If the voltage is below 11 V, recharge the battery before proceeding to the next step.

    2. DIAGNOSIS


      1. A005W8KE05

        If the skid control ECU detects a malfunction, the ABS warning light and brake system warning light (red indicator) will come on in order to warn the driver.

    3. WARNING LIGHT INITIAL CHECK


      1. A005W8KE05

        Release the parking brake.

        CAUTION:

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

        Tech Tips

        When the brake fluid level is low, the brake system warning light (red indicator) comes on.

      2. When the ignition switch is turned to ON, check that the ABS warning light and brake system warning light (red indicator) come on for approximately 3 seconds.

        If the warning light check result is not normal, proceed to troubleshooting for the ABS warning light and brake system warning light (red indicator) circuits listed below.

      4. Trouble Area See procedure
      ABS warning light circuit (Remains on)

      Click here

      ABS warning light circuit (Does not come on)

      Click here

      Brake system warning light (red indicator) circuit (Remains on)

      Click here

      Brake system warning light (red indicator) circuit (Does not come on)

      Click here