| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000ZY3I |
| Model Year Start: 2017 | Model: Sienna | Prod Date Range: [08/2016 - ] |
| Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: PROBLEM SYMPTOMS TABLE; 2017 - 2020 MY Sienna [08/2016 - ] | ||
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 |
See page |
|---|---|---|
|
Steering is heavy. |
Front tires (improperly inflated, unevenly worn) |
|
|
Front wheel alignment (incorrect) |
|
|
|
Front suspension (Lower ball joint) |
|
|
|
Power steering gear |
|
|
|
Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) |
|
|
|
Speed sensor |
|
|
|
Brake actuator (Skid control ECU) |
|
|
|
Battery and power source system |
- |
|
|
Power source voltage of steering column assembly (Power steering ECU) |
|
|
|
Steering effort differs between right and left or is uneven. |
Front tires (improperly inflated, unevenly worn) |
|
|
Front wheel alignment (incorrect) |
|
|
|
Front suspension (Lower ball joint) |
|
|
|
Power steering gear |
|
|
|
Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) |
|
|
|
While driving, steering effort does not change in accordance with vehicle speed or the steering wheel does not return properly. |
Front suspension (Lower ball joint) |
|
|
CAN communication system |
|
|
|
Speed sensor |
|
|
|
Brake actuator (Skid control ECU) |
|
|
|
Combination meter |
|
|
|
Power steering gear |
|
|
|
Steering column assembly (Torque sensor, Power steering motor, Power steering ECU) |
|
|
|
A knocking (or cranking) sound occurs when turning the steering wheel while power steering is operating. |
Front suspension (Lower ball joint) |
|
|
Steering intermediate shaft |
- |
|
|
Power steering gear |
|
|
|
Steering column assembly |
|
|
|
Noise occurs when turning the steering wheel during low speed driving. |
Power steering gear |
|
|
Steering column assembly |
|
|
|
Friction occurs when turning the steering wheel during low speed driving. |
Steering column assembly |
|
|
High pitched sounds (squeaking) occurs when turning the steering wheel slowly with the vehicle stopped. |
Power steering gear |
|
|
Steering column assembly (Power steering motor) |
|
|
|
The steering wheel vibrates and noise occurs when turning the steering wheel from lock to lock. |
Power steering gear |
|
|
Steering column assembly |
|
|
|
EPS warning light remains on. |
Proceed to PS warning light remains on |
|
![2017 - 2020 MY Sienna [08/2016 - ]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION](/t3Portal/stylegraphics/info.gif)
|
|