POWER STEERING SYSTEM PROBLEM SYMPTOMS TABLE

Power Steering System
Symptom Suspected Area Link
Heavy steering Front tires (improperly inflated, unevenly worn)

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Front wheel alignment (incorrect)

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Front suspension (Lower ball joint)

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Rack and pinion power steering gear assembly

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Toruque sensor (Rack and pinion power steering gear assembly)
Power steering motor (Rack and pinion power steering gear assembly)
Steering column assembly

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Battery and power source circuit

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Power source voltage of power steering ECU (Rack and pinion power steering gear assembly)

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CAN communication system

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Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle)

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Steering effort differs between right and left or is uneven Rotation angle sensor initialization and torque sensor zero point calibration incomplete

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Front tires (improperly inflated, unevenly worn)

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Front wheel alignment (incorrect)

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Front suspension (Lower ball joint)

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Rack and pinion power steering gear assembly

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Toruque sensor (Rack and pinion power steering gear assembly)
Steering column assembly

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Power steering ECU (Rack and pinion power steering gear assembly)

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While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily Skid control ECU assembly

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Speed sensor

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Toruque sensor (Rack and pinion power steering gear assembly) Click here
Power steering motor (Rack and pinion power steering gear assembly)
Power steering ECU (Rack and pinion power steering gear assembly)
CAN communication system

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Friction sounds occur when turning steering wheel during low speed driving Power steering motor (Rack and pinion power steering gear assembly)

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Steering column assembly

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Spiral with sensor cable sub-assembly

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Steering column cover contacting steering wheel assembly

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High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped Power steering motor (Rack and pinion power steering gear assembly)

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Steering wheel installation (incorrect)

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Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock Power steering motor (Rack and pinion power steering gear assembly)

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Steering column assembly

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Steering wheel installation (incorrect)

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EPS warning light remains on EPS warning light circuit

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