Problem Symptoms Table
HINT:
- Use the table below to help determine the cause of the problem symptom. 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.
- The electrical equipment operation may be limited by the load control of electric power control system. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.
Power steering system:
PROBLEM SYMPTOM CHARTSymptom Suspected Area See Steering is heavy. Front tires (Improperly inflated, unevenly worn) FRONT WHEEL ALIGNMENT (FOR 2WD) Front wheel alignment (Incorrect) FRONT WHEEL ALIGNMENT (FOR 2WD) Front suspension ON-VEHICLE INSPECTION Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Steering column assembly (w/ VGRS) REMOVAL Steering column assembly (w/o VGRS) REMOVAL Battery and power source system DATA LIST/ACTIVE TEST Power source voltage of power steering ECU TERMINALS OF ECU Power steering converter assembly DC/DC CONVERTER Power steering ECU TERMINALS OF ECU Vehicle condition (The steering wheel is turned from left to right repeatedly with the vehicle stopped or a heavy load is continuously applied to the vehicle) DATA LIST/ACTIVE TEST Steering effort differs between right and left or is uneven. Power steering ECU (Steering center point is not recorded correctly) CALIBRATION Front tires (Improperly inflated, unevenly worn) FRONT WHEEL ALIGNMENT (FOR 2WD) Front wheel alignment (Incorrect) FRONT WHEEL ALIGNMENT (FOR 2WD) Front suspension ON-VEHICLE INSPECTION Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Steering column assembly (w/ VGRS) REMOVAL Steering column assembly (w/o VGRS) REMOVAL Power steering ECU TERMINALS OF ECU While driving, steering effort does not change in accordance with vehicle speed, or the steering wheel does not return to its centered position easily. Speed sensor REMOVAL Skid control ECU TERMINALS OF ECU Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Power steering ECU TERMINALS OF ECU Friction sounds occur when turning steering wheel during low speed driving. Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Power steering ECU TERMINALS OF ECU PS warning light remains on. PS warning light remains on PS WARNING LIGHT REMAINS ON A knocking (or cranking) sound occurs when turning the steering wheel back and forth while power steering is in operation. Front suspension ON-VEHICLE INSPECTION Steering intermediate shaft - Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Noise occurs when turning the steering wheel during low speed driving. Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Steering column assembly (w/ VGRS) REMOVAL Steering column assembly (w/o VGRS) REMOVAL High-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. Power steering gear assembly (w/ VGRS) STEERING GEAR (W/ VGRS) Power steering gear assembly (w/o VGRS) STEERING GEAR (W/O VGRS) Steering column assembly (w/ VGRS) REMOVAL Steering column assembly (w/o VGRS) REMOVAL