VEHICLE STABILITY CONTROL SYSTEM PRECAUTION


  1. TROUBLESHOOTING PRECAUTIONS


    1. When there is a malfunction with terminal contact points or part installation problems, removal and installation of the suspected parts may return the system to the normal condition either completely or temporarily.

    2. In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as DTC output and the Freeze Frame Data, and record them before disconnecting each connector or removing and installing parts.

    3. Since the system may be influenced by malfunctions in systems other than the VSC system, be sure to check for DTCs in other systems.

  2. HANDLING PRECAUTIONS


    1. Do not remove or install VSC parts such as the steering sensor or yaw rate sensor except when necessary, as they must be calibrated after removal or installation.

    2. Be sure to perform preparation before work and confirmation after work is completed by following the directions in the repair manual when working on the VSC system.

    3. Be sure to remove and install the ECU, brake actuator and each sensor, etc. with the engine switch off unless it is specified in the inspection procedure.

    4. If the ECU, brake actuator or a sensor has been removed and installed, it is necessary to check the system for problems after the parts have been reassembled. Check for DTCs using the GTS, and also check that system functions and signals received by the ECU are normal using Test Mode.

  3. DTC PRECAUTION


    1. Warnings for some DTCs will not be cleared by just replacing the defective parts. If a warning is still displayed after completing a repair, turn the engine switch off before beginning the procedure for clearing DTCs.

      Note

      If a part is still malfunctioning even after the DTC is cleared, the DTC will be stored again.

  4. CHASSIS DYNAMOMETER PRECAUTION

    When testing with a drum tester such as a speedometer tester, a combination tester for the speedometer and brake, a chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter the Inspection Mode and stop the TRC and VSC systems.

    Enter Inspection Mode to disable TRC and VSC control when using a chassis dynamometer.

    Tech Tips

    The vehicle may move unexpectedly out of the dynamometer because of TRC and VSC operations.

    Note


    • Secure the vehicle with the lock chain for safety.

    • When performing procedures related to VSC OFF switch operation, make sure that the mode is VSC OFF mode.


    1. Activating Inspection Mode (When Using the GTS)


      1. Make sure that the engine switch is off and the engine is stopped.

      2. Make sure that the shift lever is in P.

      3. Connect the GTS to the DLC3.

      4. Start the engine.

      5. Turn the GTS on.

      6. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Inspection Mode.

      7. Check that the TRC OFF message is displayed on the multi-information display and that the VSC OFF indicator light comes on.

        Tech Tips


        • If the TRC OFF message is displayed on the multi-information display and the VSC OFF indicator light does not come on, repeat the steps.

        • Turning the engine switch off ends Inspection Mode.

    2. Activating Inspection Mode (When not Using the GTS)

      Tech Tips


      • Perform steps "D" to "H" within 30 seconds.


      1. Make sure that the engine switch is off and the engine is stopped (Step "A").

      2. Make sure that the shift lever is in P (Step "B").

      3. Start the engine (Step "C").

      4. Apply the parking brake (Step "D").

      5. Depress and release the brake pedal twice (Step "E").

      6. Depress and hold the brake pedal down, and then release and apply the parking brake twice (Step "F").

      7. With the parking brake applied, depress and release the brake pedal twice (Step "G").

      8. Check if the TRC OFF message is displayed on the multi-information display and that the VSC OFF indicator light comes on (Step "H").

        Tech Tips


        • If the TRC OFF message is displayed on the multi-information display and the VSC OFF indicator light does not come on in step "H", repeat the steps from "A" to "H".

        • Turning the engine switch off ends Inspection Mode.

  5. CAN COMMUNICATION SYSTEM PRECAUTIONS


    1. The CAN communication system is used for data communication between the skid control ECU (brake actuator assembly), the steering sensor, the yaw rate sensor and other ECUs. If there are any problems in the CAN communication lines, corresponding DTCs for the communication lines are output.

    2. If any CAN communication line DTCs are output, repair the malfunction in the communication lines and troubleshoot the VSC system after data communication becomes normal.

    3. In order to enable CAN communication, a specific type of wiring is used for the CAN communication lines. The wiring used for each communication line is a twisted pair of wires that have an equal length. A bypass wire should not be used because the data being transmitted will be corrupted.