VGRS System Stops or does not Operate: Procedure

1. Use the Data List to check if the record of overheat is functioning properly.
   VGRS:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Motor Overheat Record	Record of continuous overheat preventive control / Rec or Unrec	Rec or Unrec	-

   Result

   Result	Proceed to
   "Rec" (Record motor overheating)	A
   "Unrec" (No record of motor overheating)	B

   HINT: 

   If "Rec" is displayed, reset the setting to "Unrec". Enter the VGRS menu on the tester, select record clearance, and follow the prompts to set to "Unrec".

B → See step   3 

A: Go to next step 

1. Turn the engine switch on (IG) and wait for 30 minutes until the steering actuator cools down.
2. Start the engine and slowly turn the steering wheel from lock to lock (approximately 90°/sec) 3 times.

   HINT: 

   If turning the steering wheel quickly while driving at low speeds, the steering angle may differ between the left and right, or the steering wheel may become off-center.

   However, this is not a malfunction.

3. Check the number of turns from lock to lock.

   Result

   Result	Proceed to
   3.2 turns	A
   2.7 turns	B

B → VGRS SYSTEM IS NORMAL 

A: Go to next step 

1. Start the engine.
2. Turn the steering wheel.
3. Measure the steering effort.

   Standard steering effort

   Below 6.9 N*m (70 kgf*cm, 61 in.*lbf)

   HINT: 

   After completing the inspection or repair, attempt to simulate the problem and then perform "READ VALUE USING TECHSTREAM" above again to reconfirm that the problem does not occur.

NG → See step   7 

OK: Go to next step 

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

   OK

   Neither an abnormal noise nor vibration occurs.

NG → See step   8 

OK: Go to next step 

1. Turn the engine switch on (IG).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage of the steering control ECU.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A42-3 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   A42-8 (PIG) - Body ground	Engine switch on (IG)	11 to 14 V

3. Turn the engine switch off.
4. Measure the resistance of the steering control ECU.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A42-7 (PGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6