| Description and Operation WARNING:Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts the eyes, flush the eyes for 15 minutes with cold running water. Get medical attention. If irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately. Failure to follow these instructions may result in personal injury. The anti - lock brake system operates as follows: - Wheel lock - up is prevented during heavy braking by modulating brake pressure.
- The system permits the driver to maintain steering control and stop the vehicle in the shortest possible distance under most conditions.
- During the anti - lock brake operation, the driver will sense a pulsation in the brake pedal and hear a clocking sound.
- The pedal effort and pedal feel during normal braking are similar to that of a conventional power brake system.
Hydraulic and Electronic Control Unit (HECU) The hydraulic and electronic control unit (HECU) is an integrated unit. The HECU consists of: - hydraulic control unit (HCU) consisting of an aluminum block containing solenoid valves and a pump motor
- electronic control unit (ECU) consisting of a printed circuit board with microprocessors, integrated software and the magnetic coils for driving the solenoid valves in the HCU
Both the HCU and ECU are serviceable parts, but neither is repairable. Wheel Speed Sensors Active wheel speed sensors consists of: - four wheel speed sensors, located at each wheel, containing a small processor for sending a digital signal to the ECU
- an encoder ring with a magnetic profile embedded within the material
Electronic Brake Distribution Electronic brake force distribution (EBD) takes the place of pressure conscious regulators (PCRVs) and load sensing proportioning valves (LAVs) used in conventional braking systems and features in all ABS/TCS systems. The EBD function is an additional programme (software) to the conventional ABS programme that allows greater utilization of the rear brakes up to the point of ABS intervention. It can come into operation during regular braking, dependant on the loading of the vehicle and the surface friction. In contrast to the PCR or LAV, during EBD control the brake force is determined not by the brake pressure or vehicle speed but by the wheel slip. | 
