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
Heavy steering Front tires (improperly inflated, unevenly worn)

Click here

Front wheel alignment (incorrect)

Click here

Front suspension (lower ball joint)

Click here

Electric power steering column sub-assembly

Click here

Torque sensor (Electric power steering column sub-assembly) -
Power steering motor -
Speed sensor

Click here

Auxiliary battery and power source system -
Power steering ECU assembly power source voltage and relay

Click here

Power steering ECU assembly (for Manual tilt and manual telescopic steering column)

Click here

Power steering ECU assembly (for Power tilt and power telescopic steering column)

Click here

CAN communication system

Click here

Steering effort differs between turning right and left, or steering effort is uneven. Calibration of torque sensor zero point is not completed

Click here

Front tires (improperly inflated, unevenly worn)

Click here

Front wheel alignment (incorrect)

Click here

Front suspension (lower ball joint)

Click here

Steering gear assembly

Click here

Torque sensor (Electric power steering column sub-assembly) -
Electric power steering column sub-assembly

Click here

Power steering motor -
Power steering ECU assembly (for Manual tilt and manual telescopic steering column)

Click here

Power steering ECU assembly (for Power tilt and power telescopic steering column)

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

Combination meter assembly

Click here

Torque sensor (Electric power steering column sub-assembly) -
Power steering motor -
Power steering ECU assembly (for Manual tilt and manual telescopic steering column)

Click here

Power steering ECU assembly (for Power tilt and power telescopic steering column)

Click here

CAN communication system

Click here

A knocking (or clunking) sound occurs when turning the steering wheel back and forth while power steering is operating. Front suspension (lower ball joint)

Click here

Steering intermediate shaft assembly -
Power steering ECU assembly (for Manual tilt and manual telescopic steering column)

Click here

Power steering ECU assembly (for Power tilt and power telescopic steering column)

Click here

Noise occurs when turning the steering wheel during low-speed driving. Steering gear assembly

Click here

Electric power steering column sub-assembly

Click here

Friction occurs when turning the steering wheel during low-speed driving. Power steering motor -
Electric power steering column sub-assembly

Click here

A high-pitched sound (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. Power steering motor -
The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock with the vehicle stopped. Steering gear assembly

Click here

Electric power steering column sub-assembly

Click here

DTCs cannot be output (Terminals TC and CG of the DLC3 are connected). TC and CG terminal circuit

Click here

IG power source circuit

Click here

Combination meter assembly

Click here

Signal check cannot be performed (Terminals TS and CG of the DLC3 are connected). TS and CG terminal circuit

Click here

Power steering ECU assembly (for Manual tilt and manual telescopic steering column)

Click here

Power steering ECU assembly (for Power tilt and power telescopic steering column)

Click here

Drive mode does not change. Drive mode switch circuit

Click here

EPS warning light remains on. EPS warning light circuit

Click here