Toyota Venza manuals

Toyota Venza: Precaution

PRECAUTION

1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE

NOTICE:

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

System

See Procedure

Back Door Closer System


Power Back Door System


2. 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 section.

Expression

Switch Type

Ignition Switch (Position)

Engine Switch (Condition)

Ignition switch off

LOCK

off

Ignition switch ON

ON

on (IG)

Ignition switch ACC

ACC

on (ACC)

Engine start

START

start

3. TROUBLESHOOTING PRECAUTIONS

(a) 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.

(b) 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.

(c) 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

(a) Do not remove or install VSC parts such as the steering angle sensor or yaw rate and acceleration sensor except when required, as they cannot be adjusted correctly after removal or installation.

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

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

(d) 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 Techstream, also check that system functions and signals received by the ECU are normal using Test Mode.

5. DTC PRECAUTION

(a) 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 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 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.

NOTICE:

Secure the vehicle with the lock chain for safety.

(a) 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 TRAC OFF indicator and VSC OFF indicator lights will come on.

HINT:

  • If the TRAC OFF indicator and VSC OFF indicator lights do not come on, repeat the steps.
  • Turning the ignition switch off ends Inspection Mode.

(b) Activating Inspection Mode (When not Using the Techstream)

HINT:

  • Perform steps "D" to "H" within 30 seconds.
  • Perform steps "F" and "G" within 15 seconds each.

(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 TRAC OFF indicator and VSC OFF indicator lights will come on (Step "H").

HINT:

  • If the TRAC OFF indicator and VSC OFF indicator lights do not come on in step "H", repeat the steps from "A" to "H".
  • Turning the ignition switch off ends Inspection Mode.

7. CAN COMMUNICATION SYSTEM PRECAUTIONS

(a) The CAN communication system is used for data communication between the skid control ECU, the steering angle sensor, the yaw rate and acceleration sensor and other ECUs. If there is trouble in the CAN communication line, corresponding DTCs in the communication line are output.

(b) If any DTC in the CAN communication line is output, repair the malfunction in the communication line and troubleshoot the VSC system while data communication is normal.

(c) 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.

Vehicle Stability Control System
...

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