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

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   READ VALUE USING GTS

   
   

   1. Turn the power switch off.

   2. Connect the GTS to the DLC3.

   3. Turn the power switch on (IG).

   4. Turn the GTS on.

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

   6. According to the display on the GTS, read the Data List.

      
      
      1. Chassis > VGRS > Data List

         Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
         Limited Control Count(Overheat-Weak)	Limited control count (overheat-weak)	Min.: 0 Max.: 255	0	-
         Limited Control Count(Overheat-Mid)	Limited control count (overheat-mid)	Min.: 0 Max.: 255	0	-
         Limited Control Count(Overheat-Strong)	Limited control count (overheat-strong)	Min.: 0 Max.: 255	0	-
         N Pos Stop Control Count	N pos stop control count	Min.: 0 Max.: 255	0	-
         Cur Pos Stop Control Count	Cur pos stop control count	Min.: 0 Max.: 255	0	-
         Prompt Stop Control Count	Prompt stop control count	Min.: 0 Max.: 255	0	-
         Limited Control Count(System Heavily-loaded)	Limited control count (system heavily-loaded)	Min.: 0 Max.: 255	0	-

      2. 
         
         10. 
             
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         15. 
             
         16. 
             
      
      
      1. Chassis > VGRS > Data List

         Tester Display
         Limited Control Count(Overheat-Weak)
         Limited Control Count(Overheat-Mid)
         Limited Control Count(Overheat-Strong)
         N Pos Stop Control Count
         Cur Pos Stop Control Count
         Prompt Stop Control Count
         Limited Control Count(System Heavily-loaded)

      2. 
         
         1. 
            
      3. 
         
         10. 
             
         11. 
             
         12. 
             
         13. 
             
         14. 
             
         15. 
             
         16. 
             
      Tip:

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

      Result
      Result Proceed to One of the Data List items has a count of 1 or more. A All of the Data List items has a count of 0. B

   
   
   • AClick here
   • B

     USE SIMULATION METHOD TO CHECKClick here

2. Click here

   CUSTOMER PROBLEM ANALYSIS

   
   

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

      Tip:

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

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

   
   
   • AClick here
   • BClick here

     GO TO STEP 5

3. Click here

   CHECK STEERING EFFORT

   
   

   1. Check the steering torque when the steering wheel is turned with the vehicle stopped.

      Click here

      OK
      The steering torque is normal.

      Tip:

      When the steering effort is large, VGRS system operation stops to protect the system.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

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

4. Click here

   CHECK STEERING ACTUATOR ASSEMBLY

   
   

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

      OK
      Neither abnormal noise nor vibration occurs.

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE STEERING ACTUATOR ASSEMBLYClick here

5. Click here

   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

   
   
   • A

     END

   • B

     REPLACE STEERING ACTUATOR ASSEMBLYClick here