Toyota Highlander Service Manual: Problem symptoms table

Toyota Highlander Service Manual / Power steering / Power steering system / Problem symptoms table

HINT: Use the table below to help determine the cause of the problem. The numbers indicate likely causes of the problem in descending order. Check each part in order. Repair or replace parts as necessary.

Symptom	Suspected Area
Hard steering	Tires (Improperly inflated) Power steering fluid level (Low) Drive belt (Loose) 2AZ-FE: 3MZ-FE: Front wheel alignment (Incorrect) Steering system joints (Worn) Suspension arm ball joints (Worn) Steering column (Binding) Power steering vane pump 2AZ-FE: 3MZ-FE: Power steering gear
Poor return	Tires (Improperly inflated) Front wheel alignment (Incorrect) Steering column (Binding) Power steering gear
Excessive freeplay	Steering system joints (Worn) Suspension arm ball joints (Worn) Intermediate shaft, Sliding yoke (Worn) Front wheel bearing (Worn) Power steering gear
Abnormal noise	Power steering fluid level (Low) Steering system joints (Worn) Power steering vane pump 2AZ-FE: 3MZ-FE: Power steering gear

Precaution

1. HANDLING PRECAUTIONS FOR STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in a driving hazard. ...

On-vehicle inspection

1. INSPECT DRIVE BELT (a) Visually check the belt for excessive wear, frayed cords, etc. If any defect is found, replace the drive belt. HINT: Cracks on the rib side of a belt are considered ...

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Customer problem analysis
HINT: In troubleshooting, the problem symptoms must be confirmed accurately. Preconceptions should be discarded in order to give an accurate judgement. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the condit ...