VARIABLE GEAR RATIO STEERING SYSTEM > VGRS System Stops or does not Operate
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INSPECTION PROCEDURE
HINT:
This problem may be caused by a malfunction in the vehicle stability control system or steering system.
Make sure that no DTC is output for the skid control ECU or steering control ECU before proceeding with the following procedures.
If a DTC is output for either of these ECUs, first troubleshoot it and then proceed to the troubleshooting below.
1.READ VALUE USING INTELLIGENT TESTER (RECORD OF OVERHEAT)
a. 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 of 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 Go to step 3
A
2.CHECK HEAT PROTECTION FUNCTION FOR STEERING ACTUATOR
a. Turn the engine switch on (IG) and wait for 30 minutes until the steering actuator cools down.
b. 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.
c. 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
3.CHECK STEERING EFFORT
a. Start the engine.
b. Turn the steering wheel.
c. Measure the steering effort.
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