POWER STEERING SYSTEM PROBLEM SYMPTOMS TABLE

Tech Tips

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Power Steering System
Symptom	Suspected Area	See page
Steering is heavy.	Front tires (Improperly inflated, unevenly worn)	Click here
	Front wheel alignment (Incorrect)	Click here
	Front suspension (Lower ball joint)	Click here
	Power steering gear assembly	Click here
	Steering column assembly	Click here
	Torque sensor (Built into steering column assembly)	-
	Power steering motor	-
	Speed sensor	Click here
	Skid control ECU	-
	Battery and power source system	-
	Power steering ECU power source voltage and relay	-
	Power steering ECU assembly	Click here
Steering effort differs between turning right and left or steering effort is uneven.	Calibration of turning angle sensor output and torque sensor	Click here
	Front tires (Improperly inflated, unevenly worn)	Click here
	Front wheel alignment (Incorrect)	Click here
	Front suspension (Lower ball joint)	Click here
	Power steering gear	Click here
	Torque sensor (Built into steering column assembly)	-
	Steering column assembly	Click here
	Power steering motor	-
	Power steering ECU assembly	Click here
While driving, steering effort does not change in accordance with vehicle speed or the steering wheel does not return properly.	Front suspension (Lower ball joint)	Click here
	Speed sensor	Click here
	Skid control ECU (Built into brake actuator)	-
	Combination meter	Click here
	Torque sensor (Built into steering column assembly)	-
	Power steering motor	-
	Power steering gear assembly	Click here
	Power steering ECU assembly	Click here
A knocking (or clunking) sound occurs when turning the steering wheel while power steering is operating.	Front suspension (Lower ball joint)	Click here
	Steering intermediate shaft	-
	Power steering gear	Click here
Noise occurs when turning the steering wheel during low speed driving.	Power steering gear	Click here
	Steering column assembly	Click here
	Power steering ECU assembly	Click here
High-pitched sounds (squeaking) occur when turning the steering wheel slowly with the vehicle stopped.	Power steering gear assembly	Click here
	Power steering motor	-
The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock.	Power steering gear assembly	Click here
	Steering column assembly	Click here
P/S warning light remains on.	P/S warning light	Click here