VEHICLE STABILITY CONTROL SYSTEM(for Vacuum Brake Booster) DIAGNOSIS SYSTEM


  1. DESCRIPTION

    When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the GTS to the vehicle and reading various data output from the vehicle's 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 GTS to the DLC3 of the vehicle. The GTS enables you to clear the DTCs, activate 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. If the skid control ECU (brake actuator assembly) detects a malfunction, the ABS warning light, slip indicator light and brake warning light come on in order to warn the driver.

      2. DTCs are simultaneously stored in memory. Output DTCs can be read by connecting the GTS Click here.

      3. This system has a test mode (signal check) function Click here.

    3. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK


      1. When the ignition switch is turned to ON, check that the ABS warning light, brake warning light and slip indicator light come on for approximately 3 seconds.

        Tech Tips


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

        • If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning light, brake warning light and slip indicator light circuits.

          If an indicator remains on or does not come on, proceed to troubleshooting for the light 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 warning light circuit (Remains on)

      Click here

      Brake warning light circuit (Does not come on)

      Click here

      Slip indicator light circuit (Remains on)

      Click here

      Slip indicator light circuit (Does not come on)

      Click here