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

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200
Variable Gear Ratio Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK IF STEERING WHEEL IS CENTERED

CHECK TIRE SIZE

CUSTOMER PROBLEM ANALYSIS

CHECK STEERING ANGLE SENSOR ZERO POINT

CUSTOMER PROBLEM ANALYSIS

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


INSPECTION PROCEDURE

NOTICE:
When replacing the steering actuator assembly, perform actuator angle neutral point calibration and initialization after replacement (Click here).
1.CHECK FOR DTC

  1. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B



B
GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
A


2.CHECK IF STEERING WHEEL IS CENTERED

  1. Check if the neutral position of the steering wheel is always incorrect.

    Result
    Result
    		Proceed to
    The steering wheel neutral position is always incorrect
    		A
    The steering wheel neutral position deviated in the past, but is now correct.
    		B



B
Go to step 6
A


3.CHECK TIRE SIZE

  1. Check all the tires.

    Result
    Result
    		Proceed to
    All tire sizes are correct and tire pressures are normal
    		A
    Size of any tire is incorrect
    		B
    All tire sizes are correct, but tire pressures are incorrect
    		C



B
REPLACE WITH SPECIFIED SIZE TIRE (Click here)

C
ADJUST TIRE PRESSURE TO SPECIFIED VALUE (Click here)
A


4.CUSTOMER PROBLEM ANALYSIS

  1. Check if a front wheel alignment adjustment has been performed in the past. Also, if an adjustment has been performed, check if actuator angle neutral point calibration and initialization was performed.

    Result
    Result
    		Proceed to
    1. A front wheel alignment adjustment has not been performed.
    2. After a front wheel alignment adjustment was performed, actuator angle neutral point calibration and initialization was performed.
    		A
    After a front wheel alignment adjustment was performed, actuator angle neutral point calibration and initialization was not performed.
    		B



B
PERFORM STEERING ANGLE ADJUSTMENT AND VGRS SYSTEM CALIBRATION
A


5.CHECK STEERING ANGLE SENSOR ZERO POINT

  1. Position the tires straight ahead.

  1. Turn the engine switch off.

  1. Disconnect the steering actuator assembly connector from the VGRS ECU (steering control ECU).

  1. Perform a driving test and check whether the steering neutral position changes after the test.

    OK:
    The position does not change.


NG
PERFORM FRONT AND REAR WHEEL ALIGNMENT ADJUSTMENT
OK

PERFORM STEERING ANGLE ADJUSTMENT AND VGRS SYSTEM CALIBRATION

6.CUSTOMER PROBLEM ANALYSIS

  1. Confirm the conditions present when the steering wheel neutral position deviates.

    Result
    Result
    		Proceed to
    1. The neutral position deviated when the steering wheel was turned abruptly. However, when the steering wheel is slowly turned, no deviation occurs.
    2. The neutral position deviated when the required effort to turn the steering wheel increased, such as when repeatedly turning the steering wheel when the vehicle is stopped or when turning the steering wheel when the tires are up against a curb.
    3. The neutral position deviated when the required effort to turn the steering wheel increased under conditions different than the 2 conditions listed above.
    4. The neutral position deviated when the battery was fully depleted.
    		A
    The steering wheel neutral position deviated when the required steering effort was normal.
    		B

    HINT:
    1. When the steering wheel is turned abruptly, the required steering effort may increase and the neutral position may deviate.
    2. When the steering torque is large, the actuator easily overheats. In this situation, the system is stopped to prevent the actuator from overheating.


B
REPLACE STEERING ACTUATOR ASSEMBLY (Click here)
A

END