Variable Gear Ratio Steering System Steering Wheel Is Off-Center Or Deviates From Neutral Position

Steering. Lexus Gs430, Gs300. Uzs190 Grs190
Steering Column. Lexus Gs430, Gs300. Uzs190 Grs190

INSPECTION PROCEDURE

CHECK DRIVE VEHICLE

CHECK TIRE SIZE

CHECK WHEEL ALIGNMENT

VARIABLE GEAR RATIO STEERING SYSTEM - Steering Wheel is Off-center or Deviates from Neutral Position


INSPECTION PROCEDURE

This problem may be caused by a malfunction in the ECB or EPS system. Make sure that no DTC is output for the skid control ECU, power steering ECU, or steering control ECU before proceeding with the following procedures.
If a DTC is output for any of these ECUs, first troubleshoot it and then proceed.
1.CHECK DRIVE VEHICLE

  1. Drive the vehicle straight at 35 km/h or more for 5 seconds or more.

  1. Turn the steering wheel slowly from left and right several times, and then check if the steering wheel is centered.

    Result:

    Result
    		Proceed to
    The steering wheel is centered.
    		A
    The steering wheel is off-center.
    		B
    HINT:
    If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between left and right, or the steering wheel may become off-center. However, this is not a malfunction.


A
VGRS SYSTEM IS NORMAL
B


2.CHECK TIRE SIZE

  1. Check all the tires.

    Result:

    Result
    		Proceed to
    All tire sizes are correct and tire pressures are normal.
    		A
    The size of any of the tires is incorrect.
    		B
    All tire sizes are correct, but tire pressures are incorrect.
    		C


B
REPLACE WITH SPECIFIED SIZE TIRES

C
ADJUST TIRE AIR PRESSURE TO SPECIFIED VALUE
A


3.CHECK WHEEL ALIGNMENT

  1. Check wheel alignment (Click here for front, Click here for rear).

    OK:
    The wheel alignment is normal.
    HINT:
    Adjust the tie-rod ends within the specified values so that the tire angles are the same between left and right when the steering wheel is turned from lock to lock.


NG
PERFORM WHEEL ALIGNMENT ADJUSTMENT
OK

PERFORM STEERING ANGLE ADJUSTMENT AND VGRS SYSTEM CALIBRATION