Vehicle Stability Control System Diagnosis System

  1. DESCRIPTION

  1. DIAGNOSIS

  1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

Vehicle Stability Control System -- Diagnosis System



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 vehicle's skid control ECU (brake actuator assembly).
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.

    Standard Voltage:
    11 to 14 V
    If the voltage is below 11 V, recharge the battery before proceeding to the diagnosis.

DIAGNOSIS

  1. If the skid control ECU (brake actuator assembly) detects a malfunction, the ABS warning, brake warning, slip indicator and VSC OFF indicator lights will come on in accordance with the trouble area to warn the driver.

  2. The DTCs are simultaneously stored in 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 VSC OFF indicator lights, or by connecting the intelligent tester (Toyota Fortuner RM000000XHV0C7X.html).

  3. This system has a Test Mode (signal check) function (Toyota Fortuner RM000000XHT08TX.html).


WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

  1. Release the parking brake.

    CAUTION:
    Before releasing the parking brake, move the shift lever to P (for Automatic Transmission) or set chocks to hold the vehicle (for Manual Transmission) for safety.
    HINT:
    When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.

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