ABS anti-lock braking system (Brakes)

ABS ANTI-LOCK BRAKING SYSTEM

1. ABS modulator unit
2. Electronic control unit
3. Master cylinder
4. Brake pressure proportioning valve

Description

The ABS system is an electronic control unit (ECU), controlled system deriving its input from four speed sensors, one mounted at each wheel, which allow the ABS to control the hydraulic modulator to prevent the wheels locking during braking.

The operation of the ABS is completely dependent upon electronic signals. To prevent the ABS responding to any inaccurate signals, a built in safety circuit monitors all electric and electronic signals, including battery voltage. If an inaccurate signal or low battery voltage is detected, the ABS is shut down immediately and the warning light on the fascia is illuminated to inform the driver that the brake system will respond to pedal pressure in the same manner as a non ABS.

5. Brake pedal
6. Servo unit
7. Brake caliper