VGRS System Stops or does not Operate [12/2017 - 10/2023]: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Turn the Techstream on.
5. Enter the following menus: Chassis / VGRS / Data List.
6. According to the display on the Techstream, read the Data List.

   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	-

   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)

   HINT: 

   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

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023] 

Result: 

A 

See step  2

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

   HINT: 

   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

Result: 

B 

See step  5

Result: 

A 

See step  3

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

   Refer to ON-VEHICLE INSPECTION [12/2017 - 10/2023]

   OK

   The steering torque is normal.

   HINT: 

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

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO POWER STEERING SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to  PROBLEM SYMPTOMS TABLE [12/2017 - 10/2020]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2020 - 10/2023] 

Result: 

OK 

See step  4

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

   OK

   Neither abnormal noise nor vibration occurs.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE STEERING ACTUATOR ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

OK 

See step  5

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

Result: 

A 

END 

Result: 

B 

REPLACE STEERING ACTUATOR ASSEMBLY. Refer to  REMOVAL [12/2017 - 09/2018]  , or refer to  REMOVAL [09/2018 - 10/2020]  , or refer to  REMOVAL [10/2020 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]