2002 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Problem Symptoms Table

HINT:

Use the table below to help you find the cause of the problem. The numbers indicate the priority of the like cause of the problem. Check each part in the order shown. If necessary, repair or replace these parts.

PROBLEM SYMPTOMS TABLE - STEERING SYSTEM

Symptom Suspect Area
Hard steering
  1. Tires (Improperly inflated)
  2. Power steering fluid level (Low)
  3. Drive belt (Loose)
  4. Front wheel alignment (Incorrect)
  5. Steering system joints (Worn)
  6. Suspension arm ball joints (Worn)
  7. Steering column (Binding)
  8. Power steering vane pump
  9. Power steering gear
  10. PPS system
Poor return
  1. Tires (Improperly inflated)
  2. Front wheel alignment (Incorrect)
  3. Steering column (Binding)
  4. Power steering gear
Excessive play
  1. Steering system joints (Worn)
  2. Suspension arm ball joints (Worn)
  3. intermediate shaft, Universal joint, Sliding yoke (Worn)
  4. Front wheel bearing (Worn)
  5. Power steering gear
  6. PPS system
Abnormal noise
  1. Power steering fluid level (Low)
  2. Steering system joints (Worn)
  3. Power steering gear

HINT:

When the problem occurs on the power tilt and telescopic steering system, refer to the DI section (See POWER TILT AND POWER TELESCOPIC STEERING ).

Chapter Navigation
Return to Chapter: Steering System
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.