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Vehicle Stability Control System: Precaution: Precaution

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. PRECAUTION FOR DISCONNECTING THE CABLE FROM THE NEGATIVE BATTERY 
    NOTE:

    When disconnecting the cable from negative (-) battery terminal, initialize the following systems after the cable is reconnected.

    System See Procedure
    Power Window Control System Refer to INITIALIZATION
    Sliding Roof System Refer to INITIALIZATION
  2. TROUBLESHOOTING PRECAUTION 
    NOTE:
    • When there is a malfunction in the contact point of the terminals or installation problems with parts, removal and installation of the suspected problem parts may return the system to the normal condition either completely or temporarily.
    • In order to determine the malfunctioning area, be sure to check the conditions at the time the malfunction occurred, such as by DTC output and freeze frame data output, and record it before disconnecting each connector or removing and installing parts.
    • Since the ABS with EBD & BA & TRAC & VSC systems may be influenced by a malfunction in the other systems, be sure to check for DTCs in the other systems.
    • Be sure to remove and install the ABS & TRACTION actuator assembly and each sensor with the ignition switch off unless specified in the inspection procedure.
    • When removing and installing the ABS & TRACTION actuator assembly and each sensor, be sure to check that the normal display is output in the test mode inspection and in the DTC output inspection after installing all the parts.
    • After replacing the ABS & TRACTION actuator assembly and/or the yaw rate and acceleration sensor, make sure to perform yaw rate and acceleration sensor zero point calibration.
    • The CAN communication system is used for data communication between the skid control ECU, the steering angle sensor, and the yaw rate sensor (the acceleration sensor is included).

      If there is trouble in the CAN communication line, the DTC of the communication line is output.

    • If the DTC of the CAN communication line is output, repair the malfunction in the communication line and troubleshoot the ABS with EBD & BA & TRAC & VSC systems.
    • Since the CAN communication line has its own length and route, it cannot be repaired temporarily with the bypass wire, etc.
  3. EXPRESSIONS OF IGNITION SWITCH 

    The type of ignition switch used on this model differs according to the specifications of the vehicle.

    The expressions listed in the table below are used in this service information.

    Switch Type Ignition Switch (position) Engine Switch (condition)
    Expression Ignition Switch off LOCK Off
    Ignition Switch on (IG) ON On (IG)
    Ignition Switch on (ACC) ACC On (ACC)
    Engine Start START Start
  4. CHASSIS DYNAMOMETER PRECAUTION 

    When testing with a 2-wheel 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 Inspection Mode and stop the TRAC and VSC systems.

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

    HINT: 

    • The vehicle may move unexpectedly out of the dynamometer because of TRAC and VSC operations.
    • Pressing the VSC OFF switch does not disable TRAC and VSC operations completely.
    NOTE:
    • Secure the vehicle with a 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 Techstream)
      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 Techstream to the DLC3.
      4. Start the engine.
      5. Turn the Techstream on.
      6. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Inspection Mode.
      7. Check that the SLIP indicator, TRAC OFF indicator and VSC OFF indicator lights will come on.

        HINT: 

        If the SLIP indicator, TRAC OFF indicator or VSC OFF indicator light does not come on, repeat the steps.

      8. Turn the ignition switch off.

        HINT: 

        Turning the ignition switch off ends Inspection Mode.

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

      HINT: 

      Perform steps from "D" 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 parking brake by depressing the parking brake pedal (Step "D").
      5. Depress and release the brake pedal twice (Step "E").
      6. Depress and hold the brake pedal down, then release and apply parking brake twice (Step "F").
      7. With parking brake applied, depress and release the brake pedal twice (Step "G").
      8. Check if the SLIP indicator, TRAC OFF indicator and VSC OFF indicator lights will come on (Step "H").

        HINT: 

        If the SLIP indicator, TRAC OFF indicator or VSC OFF indicator light does not come on in step "H", repeat the steps from "A" to "H".

      9. Turn the ignition switch off.

        HINT: 

        Turning the ignition switch off ends Inspection Mode.

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