P/S System Symptom Diagnosis

P/S SYSTEM SYMPTOM DIAGNOSIS PROCEDURES

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 .
	P/S belt worn, lacking in tension	Check belt tension or replace belt as necessary .
	Tire inflation pressure excessively low	Inflate tire .
	Front wheel alignment out of order	Check and adjust front wheel alignment .
	Steering wheel installed improperly (twisted)	Install steering wheel correctly .
	Bind tie-rod end ball joint or lower 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 box malfunction	Replace gear box .
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 P/S belt	Check belt tension or replace belt 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 box malfunction	Replace gear box .
Poor recovery from turns (See NOTE.)	Deformed pipes or hoses	Replace defective part .
	Steering column installed improperly	Install steering column correctly .
	Front wheel alignment out of order	Check and adjust front wheel 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 box malfunction	Replace gear box .
NOTE: To check steering wheel for recovery, with vehicle running at 22 mile/h (35 km/h), turn steering wheel 90° and let it free. If should return more than 60°.

REFERENCE ITEM SPECIFICATIONS

Condition	Possible Cause	Action
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 & left tires inflation pressure .
	Brake dragging in one wheel	Repair .
	Front wheel alignment out of order	Check and adjust front wheel alignment .
	Rear wheel alignment out of order	Check and adjust rear wheel alignment .
	Malfunction of control valve in gear box	Replace gear box .
Steering wheel play is large and vehicle wanders	Refer to STEERING SYMPTOM DIAGNOSIS .	Refer to STEERING SYMPTOM DIAGNOSIS .
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) P/S belt	Check belt tension .
	Worn P/S belt	Replace belt .
	Loose gear box 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 box	Replace gear box .
	Bearing of P/S pump shaft defective	Replace bearing .