System Operation: Abs

WARNING: This page is about a different car, the 2006 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

During anti-lock brake system (ABS) operation the anti-lock brake system (ABS) module energizes the inlet and outlet solenoid valves of the related brake and starts the return pump. The inlet solenoid valve closes to isolate the brake from pressurized fluid; the outlet solenoid valve opens to release pressure from the brake into the expansion chamber and the return pump circuit. The brake releases and the wheel begins to accelerate. The anti-lock brake system (ABS) module then operates the inlet and outlet valves to control the supply of hydraulic pressure to the brake and apply the maximum braking effort (for the available traction) without locking the wheel.

The programming for anti-lock brake system (ABS) regulation allows a higher threshold for anti-lock brake system (ABS) regulation when driving off-road in loose gravel or dirt. A locked wheel is more effective in slowing or stopping the vehicle because of the wedge that is built up in front of the tire.

The programming in the anti-lock brake system (ABS) control module allows one or both front wheel(s) to lock up at low speeds on a rough road as long as the vehicle is traveling straight ahead. If the anti-lock brake system (ABS) module receives a signal from the steering angle sensor indicating a turn, anti-lock brake system (ABS) regulation will activate to prevent wheel lock up and allow the vehicle to be steered.