Lexus LX User Manual

VARIABLE GEAR RATIO STEERING SYSTEM > PRECAUTION
for Preparation Click here
1.TROUBLESHOOTING PRECAUTIONS
a. If the problem is caused by a poor connection of a terminal or poor installation of a part, reconnecting the terminal, or removing and
reinstalling the part may solve the problem, or may temporarily return the system to normal.
b. To determine the cause of the problem, check for DTCs or confirm the vehicle operating conditions when the problem occurred and note
them down before disconnecting connectors or removing parts.
c. Be sure to check for DTCs in other systems as the problem may be caused by a malfunction in another system.
d. DTCs may be stored in the vehicle stability control system due to Variable Gear Ratio Steering (VGRS) system inspections. Check for DTCs
in the vehicle stability control system and clear any output codes after inspecting the VGRS system.
e. When the engine switch is turned on (IG)/off, the system start-up/stop operation is performed. At this time, a small operating sound can be
heard and the steering wheel turns slightly.
f. If "Invalid" is displayed for "Straight Angle Valid Flag" in the Data List, the VGRS system does not operate.
g. If the steering wheel is turned left and right with the engine switch off, a noise can be heard. However, this is not a malfunction.
2.HANDLING AND OPERATING PRECAUTIONS
a. Removal and installation of the steering control ECU, steering actuator, and each sensor must be performed with the engine switch off
unless specified.
b. If the steering control ECU, steering actuator, or a sensor is removed and installed, perform the test mode inspection, check for DTCs, and
confirm that the normal system code is output.
c. If the engine switch is turned on (IG) with the steering control ECU connector disconnected, DTCs may be stored in the vehicle stability
control system. Check for DTCs in those systems and clear any output codes after completing repairs.
3.PRECAUTIONS FOR REPLACEMENT OF STEERING SYSTEM PARTS
a. If the steering control ECU or steering actuator is replaced, perform actuator angle neutral point calibration and initialization.
b. The steering control ECU cannot be disassembled or repaired. If there is any problem with the steering control ECU, replace it with a new
one.
4.PRECAUTIONS FOR STEERING WHEEL OFF-CENTER
NOTICE:
If the steering wheel is still off-center after completing steering angle sensor initialization ( Click here), perform VGRS system calibration ( Click here).
HINT:
The steering wheel may become off-center under any of the following conditions. These conditions do not indicate a malfunction.
1. The steering wheel is turned when the engine switch is off.
2. The steering wheel is turned quickly.
3. The steering wheel is turned to the left or right lock position.
If the steering wheel is off-center, drive the vehicle at 35 km/h (22 mph) or more for 5 seconds or more, or turn the steering wheel
to the left and right with the vehicle stopped or while driving at low speeds. This may center the steering wheel.
If one of the situations under "Conditions Under Which VGRS System Does Not Operate" occurs, the steering wheel may
temporarily become off-centered.
5.CONDITIONS UNDER WHICH VGRS SYSTEM DOES NOT OPERATE
a. The VGRS system does not operate under any of the following conditions:
i. The power supply voltage is low or too high.
ii. A fail-safe function is operating to protect the system from overheating. System control is suspended to prevent the motor in the
steering actuator and the steering control ECU from overheating. If the temperatures of the motor and ECU drop, the system will
return to normal.

Lexus LX Specifications

General

Brand	Lexus
Model	LX
Category	Automobile
Language	English