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Problem Symptoms Table

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Use the table below to help determine the cause of the problem. The numbers indicate the priority of the likely causes of the problem. Check each part in order. If necessary, repair or replace these parts.

PROBLEM SYMPTOMS TABLE - STEERING SYSTEM

Symptom Inspection Area
Hard steering
  1. Front tires (improperly inflated, unevenly worn)
  2. Front wheel alignment (Incorrect)
  3. Front suspension (Lower ball joint)
  4. Steering intermediate shaft
  5. Steering column assy
  6. Steering gear assy
  7. Power steering ECU
Poor return
  1. Front tires (improperly inflated, unevenly worn)
  2. Front wheel alignment (Incorrect)
  3. Steering column assy
  4. Steering gear assy
  5. Power steering ECU
No free play or excessive play
  1. Steering intermediate shaft
  2. Steering gear assy
Knocking (or clunking) sound occurs when turning steering wheel back and forth while power steering is in operation.
  1. Steering intermediate shaft
  2. Front suspension (Lower ball joint)
  3. Front axle hub (Hub bearing)
  4. Steering gear assy
Friction sound occurs when turning steering wheel during low speed driving.
  1. Power steering motor
  2. Steering column assy
High-pitched sound (squeaking sound) occurs when turning steering wheel slowly with vehicle stopped.
  1. Power steering motor
Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock.
  1. Power steering motor
  2. Steering column assy
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