P/S System Symptom Diagnosis

Condition	Possible Cause	Action
Steering wheel feels heavy (at low speed)	Fluid deteriorated, low viscosity, different type of fluid mixed	Replace fluid.
	Pipes or hoses deformed, air entering through joint	Replace defective part.
	Insufficient air purging from P/S circuit	Purge air.
	Accessory drive (P/S) belt worn, lacking in tension	Replace belt and/or belt tension as necessary.
	Tire inflation pressure excessively low	Inflate tire.
	Front end alignment out of order	Check and adjust front end alignment.
	Steering wheel installed improperly (twisted)	Install steering wheel correctly.
	Bind in tie-rod or tie-rod end ball joint	Replace defective part.
	P/S pump hydraulic pressure fails to increase	Check pressure and repair or replace defective part.
	P/S pump hydraulic pressure increases but slowly	Check pressure and repair or replace defective part.
	Steering gear case malfunction	Replace gear case.
Steering wheel feels heavy momentarily when turning it to the left or right	Air drawn in due to insufficient amount of fluid	Add fluid and purge air.
	Slipping accessory drive (P/S) belt	Replace belt and/or belt tension as necessary.
	P/S pump hydraulic pressure fails to increase	Check pressure and repair or replace defective part.
	P/S pump hydraulic pressure increases but slowly	Check pressure and repair or replace defective part.
	Steering gear case malfunction	Replace gear case.
Poor recovery from turns	Deformed pipes or hoses	Replace defective part.
	Steering column installed improperly	Install steering column correctly.
	Front end alignment out of order	Check and adjust front end alignment.
	Ball joints binding	Replace defective part.
	P/S pump hydraulic pressure fails to increase	Check pressure and repair or replace defective part.
	P/S pump hydraulic pressure increases but slowly	Check pressure and repair or replace defective part.
	Steering gear case malfunction	Replace gear case.
Vehicle pulls to one side during straight driving	Mismatched or uneven tire	Replace tire.
	Low or uneven tire inflation pressure	Inflate tires to proper pressure or adjust right and left tires inflation pressure.
	Brake dragging in one wheel	Repair.
	Front end alignment out of order	Check and adjust front end alignment.
	Rear end alignment out of order	Check and adjust rear end alignment.
	Malfunction of control valve in gear case	Replace gear case.
Steering wheel play is large and vehicle wanders	Refer to STEERING SYMPTOM DIAGNOSIS .	Replace gear case.
Fluid leakage	Loose joints of (hydraulic pressure) pipes and hoses	Retighten.
Fluid leakage	Deformed or damaged pipes or hoses	Replace defective part.
Abnormal noise	Air drawn in due to insufficient amount of fluid	Add fluid and purge air.
	Air mixed into fluid from pipes or hoses	Replace pipes or hoses.
	Slipping (loose) accessory drive (P/S) belt	Replace belt and/or belt tension as necessary.
	Worn accessory drive (P/S) belt	Replace belt.
	Loose gear case fastening bolt	Retighten bolts.
	Loose linkage or joints	Retighten.
	Pipes or hoses in contact with part of vehicle body	Install pipes and hoses correctly.
	Vanes of P/S pump defective	Replace defective part.
	Malfunction of control valve in gear case	Replace gear case.
	Bearing of P/S pump shaft defective	Replace bearing.
No idle up	Power steering pressure switch defective	Replace power steering pressure switch.