front suspension TOYOTA RAV4 2006 Service Workshop Manual

PS–8POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
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.
Electronic power steering system
Symptom Suspected area See page
Heavy steering1. Front tires (improperly inflated, unevenly worn)TW-1
2. Front wheel alignment (incorrect)SP-3
3. Front suspension (lower ball joint)SP-27
4. Steering gear assemblyPS-42
5. Power steering motor PS-25
6. Power source voltage of power steering ECUPS-37
7. Power steering ECUPS-46
Steering effort differs between turning right and left, or
steering effort uneven1. Front tires (improperly inflated, unevenly worn)TW-1
2. Front wheel alignment (incorrect)SP-3
3. Front suspension (lower ball joint)SP-27
4. Steering gear assemblyPS-42
5. Torque sensor (built into steering column) PS-22
6. Steering column assemblySR-11
7. Power steering motor PS-25
8. Power steering ECUPS-46
While driving, steering effort does not change in
accordance with vehicle speed or steering wheel does
not return properly1. Front suspension (lower ball joint)SP-27
2. Speed sensorBC-28
3. Skid control ECUBC-41
4. Torque sensor (built into steering column) PS-22
5. Power steering motor PS-25
6. Power steering ECUPS-46
7. Controlling CAN communication systemCA-8
Friction occurs when turning steering wheel during low
speed driving1. Power steering motor PS-25
2. Steering column assemblySR-11
High-pitched sound (squeaking) occurs when turning
steering wheel slowly with vehicle stopped1. Power steering motor PS-25
Steering wheel vibrates and noise occurs when turning
steering wheel with vehicle stopped1. Power steering motor PS-25
2. Steering column assemblySR-11
P/S warning always indicated on combination meter1. Power source voltage of power steering ECUPS-37
2. Combination meterME-53
3. Power steering ECUPS-46