Variable Gear Ratio Steering System Vgrs System Stops Or Does Not Operate

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

INSPECTION PROCEDURE

CHECK FOR DTC

READ VALUE USING GTS (ABNORMAL OPERATION HISTORY)

CUSTOMER PROBLEM ANALYSIS

CHECK STEERING EFFORT

CHECK STEERING ACTUATOR ASSEMBLY

CHECK VGRS SYSTEM

VARIABLE GEAR RATIO STEERING SYSTEM - VGRS System Stops or does not Operate


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.READ VALUE USING GTS (ABNORMAL OPERATION HISTORY)

  1. Turn the engine switch off.

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / VGRS / Data List.

  1. According to the display on the GTS, read the Abnormal Operation History.

    VGRS
    Tester Display
    		Measurement Item/Range
    		Diagnostic Note
    Limited Control Count(Overheat-Weak)
    		Limited control count (overheat-weak)/
    Min.: 0
    Max.: 255
    		The number of times that overheat status of VGRS became "Overheat-Weak" and then the control was limited.
    Limited Control Count(Overheat-Mid)
    		Limited control count (overheat-mid)/
    Min.: 0
    Max.: 255
    		The number of times that overheat status of VGRS became "Overheat-Mid" and then the control was limited.
    Limited Control Count(Overheat-Strong)
    		Limited control count (overheat-strong)/
    Min.: 0
    Max.: 255
    		The number of times that overheat status of VGRS became "Overheat- Strong" and then the control was limited.
    N Pos Stop Control Count
    		N pos stop control count/
    Min.: 0
    Max.: 255
    		The number of times that power supply status to VGRS became "N Pos Stop" and then the control in "N Pos Stop" happened.
    Cur Pos Stop Control Count
    		Cur pos stop control count/
    Min.: 0
    Max.: 255
    		The number of times that power supply status to VGRS became "Cur Pos Stop" and then the control in "Cur Pos Stop" happened.
    Prompt Stop Control Count
    		Prompt stop control count/
    Min.: 0
    Max.: 255
    		The number of times that power supply status to VGRS became "Prompt Stop" and then the control in "Prompt Stop" happened.
    Limited Control Count (System Heavily-loaded)
    		Limited control count (system heavily-loaded)/
    Min.: 0
    Max.: 255
    		The number of times that VGRS system became heavily-loaded and then the control was limited.

    Result
    Result
    		Proceed to
    One of the Data List items has a count of 1 or more.
    		A
    Other than above
    		B

    HINT:
    When there is a decrease or increase in power source voltage, or during overheating prevention, VGRS system operation stops temporarily.


B
USE SIMULATION METHOD TO CHECK (Click here)
A


3.CUSTOMER PROBLEM ANALYSIS

  1. Check if operation stopped under harsh conditions, such as the steering wheel being repeatedly turned while the vehicle is stationary.

    Result
    Result
    		Proceed to
    Operation stopped under conditions that are not harsh
    		A
    Operation stopped under harsh conditions
    		B

    HINT:
    When the torque load is large, such as when driving on rough roads, VGRS system operation stops to protect the system.


B
Go to step 6
A


4.CHECK STEERING EFFORT

  1. Check the steering torque when the steering wheel is turned with the vehicle stopped (for 1VD-FTV: Click here, for 1UR-FE: Click here, for 3UR-FE: Click here).

OK:
The steering torque is normal.
HINT:
When the steering effort is large, VGRS system operation stops to protect the system.
Result
Result
Proceed to
OK
A
NG (w/ Variable Flow Control Solenoid Valve)
B
NG (w/o Variable Flow Control Solenoid Valve)
C


B
GO TO POWER STEERING SYSTEM (PROBLEM SYMPTOMS TABLE) (Click here)

C
GO TO POWER STEERING SYSTEM (PROBLEM SYMPTOMS TABLE) (Click here)
A


5.CHECK STEERING ACTUATOR ASSEMBLY

  1. Check for abnormal noise or vibration in the steering actuator assembly.

OK:
Neither abnormal noise nor vibration occurs.


NG
REPLACE STEERING ACTUATOR ASSEMBLY (Click here)
OK


6.CHECK VGRS SYSTEM

  1. Operate the steering wheel and check that the system recovers.

    Result
    Result
    		Proceed to
    The system recovers when the steering wheel is operated.
    		A
    The system recovers when the steering wheel is not operated.
    		B



B
REPLACE STEERING ACTUATOR ASSEMBLY (Click here)
A

END