VEHICLE STABILITY CONTROL SYSTEM > PRECAUTION

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1.PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:
When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected:

System
See Procedure
Parking Assist Monitor System
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2.IGNITION SWITCH EXPRESSIONS
The type of ignition switch used on this model differs according to the specification of the vehicle.
The expressions listed in the table below are used in this section.

Expression
Ignition Switch (Position)
Engine Switch (Condition)
Ignition Switch off
LOCK
Off
Ignition Switch ACC
ACC
On (ACC)
Ignition Switch ON
ON
On (IG)
Engine Start
START
Start

3.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 normal 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 it before disconnecting any 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.


4.HANDLING PRECAUTIONS

  1. Do not remove or install VSC parts such as the steering angle sensor or yaw rate and acceleration sensor (airbag sensor assembly) except when required, as they need to be adjusted correctly after removal and 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 assembly, sensors, etc. with the ignition switch off unless it is otherwise specified in the inspection procedure.

  4. If the ECU, brake actuator assembly 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 intelligent tester, also check that system functions and signals received by the ECU are normal using Test Mode.


5.DTC PRECAUTION

  1. Warnings for some DTCs cannot be cleared only by repairing the malfunctioning parts. If the warning is displayed after repair work, the DTC should be cleared after turning the ignition switch off.

    NOTICE:
    If a DTC for a malfunctioning part reappears after it was cleared, then it has been stored again.

6.CHASSIS DYNAMOMETER PRECAUTION
When testing with a 2-wheel drum tester such as a speedometer tester, a combination tester for the speedometer and brakes, a chassis dynamometer, or when jacking up the front wheels and turning the wheels, perform the following procedure to enter Inspection Mode and stop the TRC and VSC systems.
Enter Inspection Mode to disable TRC and VSC operation when using a chassis dynamometer.

HINT:
  1. If Inspection Mode is not used, the vehicle may unexpectedly move off the dynamometer because of TRC and VSC operation.
  2. The VSC OFF switch (vehicle stability control switch) must not be used to disable TRC and VSC operation when the vehicle is to be operated on a dynamometer. Pressing the VSC OFF switch (vehicle stability control switch) does not disable TRC and VSC operation completely.

NOTICE:
Secure the vehicle with lock chains for safety.

  1. Activating Inspection Mode (When Using the intelligent tester)

    1. Ensure that the ignition switch is off and the engine is stopped.

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

    3. Connect the intelligent tester to the DLC3.

    4. Start the engine.

    5. Turn the intelligent tester on.

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

    7. Check that the slip indicator light will come on.

      HINT:
      1. If the slip indicator light does not come on, repeat the steps.
      2. Turning the ignition switch off ends Inspection Mode.

  2. Activating Inspection Mode (When not Using the intelligent tester)

    HINT:
    Perform steps "C" to "H" within 30 seconds.

    1. Ensure that the ignition 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 by depressing the parking brake pedal (Step "D").

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

    6. While holding the brake pedal down, 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 slip indicator light will come on (Step "H").

      HINT:
      1. If the slip indicator light does not come on in step "H", repeat steps "A" to "H".
      2. Turning the ignition switch off ends Inspection Mode.

7.CAN COMMUNICATION SYSTEM PRECAUTIONS

  1. The CAN communication system is used for communication between the skid control ECU (brake actuator assembly), the steering angle sensor or the yaw rate and acceleration sensor (airbag sensor assembly) and other ECUs. If any CAN communication DTCs are detected, DTCs corresponding to the malfunction will be output.

  2. If any CAN communication DTCs are output, repair the malfunction and troubleshoot the VSC system while communication is 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.