VEHICLE STABILITY CONTROL SYSTEM 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 (brake actuator assembly).

    The skid control ECU (brake actuator assembly) records DTCs when it detects a malfunction in itself or in its circuits.

    To check the DTCs, connect the GTS to the DLC3 on the vehicle. The GTS 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. Check the DLC3 Click here.

    3. DIAGNOSIS


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

      2. The DTCs are simultaneously stored in the memory.

        The DTCs can be read by connecting SST between terminals TC and CG of the DLC3 and observing the blinking pattern of the ABS warning and slip indicator lights, or by connecting the GTS Click here.

      3. This system has a Test Mode (signal check) function.

        The DTCs can be read by connecting SST between terminals TS and CG of the DLC3 and observing the blinking pattern of the ABS warning and slip indicator lights, or by connecting the GTS Click here.

    4. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK


      1. Release the parking brake.

        Note

        When releasing the parking brake, move the shift lever to P for safety.

      2. When the engine switch is turned on (IG), check that the ABS warning, brake system warning (red indicator) and slip indicator lights all come on for approximately 3 seconds.

        Tech Tips

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

        If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

      5. 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

      Slip indicator light circuit (Remains on)

      Click here

      Slip indicator light circuit (Does not come on)

      Click here