Toyota Avalon Service & Repair Manual: Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, 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.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Power Steering System

Symptom

Suspected Area

Link

Heavy steering

Check assist limit record

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering effort differs between right and left or is uneven

Rotation angle sensor initialization and torque sensor zero point calibration incomplete

Front tires (improperly inflated, unevenly worn)

Front wheel alignment (incorrect)

Front suspension (Lower ball joint)

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

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 (Brake actuator assembly)

Speed sensor

Rack and pinion power steering gear assembly

CAN communication system

Friction sounds occur when turning steering wheel during low speed driving

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Spiral with cable sensor sub-assembly

Steering column cover contacting steering wheel assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column cover contacting steering wheel assembly (for Power Tilt and Power Telescopic Steering Column)

High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped

Rack and pinion power steering gear assembly

Steering wheel installation (incorrect)

Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock

Rack and pinion power steering gear assembly

Steering column assembly (for Manual Tilt and Manual Telescopic Steering Column)

Steering column assembly (for Power Tilt and Power Telescopic Steering Column)

Steering wheel installation (incorrect)

Drive mode does not change

Drive more select switch circuit

EPS warning light remains on

EPS warning light circuit

    Precaution

    System Description

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