Four-wheel steering mechanisms articulate the rear axle in addition to the front. At low speeds, the rear wheels turn opposite to the front to reduce the turning circle for tight parking. At high speeds, they turn in the same direction to enable smoother, more stable lane changes.
The diagnostic code points to a faulty actuator in the 4WS rack on the rear subframe.
When aligning a 4WS vehicle, technicians must lock the rear steering rack in its dead-center position before adjusting the front toe.
Also heard as
- four-wheel steering
- rear-wheel steering
Related terms
Turning circle
The minimum diameter required for a vehicle to complete a full 360-degree U-turn.
Steering column
The structural shaft assembly that connects the steering wheel to the steering rack or gearbox.
4x4x4
A specialized vehicle configuration featuring four wheels, four-wheel drive, and four-wheel steering.