Mazda MPV 1999-06

4-Wheel Anti-Lock Brake System (ABS)

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Description & Operation



The anti-lock control system consists of the following components:



Hydraulic control unit (HCU)
 
Anti-lock brake control module
 
Rear anti-lock brake sensor
 
Rear anti-lock brake sensor indicator
 
Front anti-lock brake sensor
 
Front anti-lock brake sensor indicator
 
Yellow ABS warning indicator
 
Red brake warning indicator
 

The anti-lock brake control module manages anti-lock braking. When the ignition switch is placed in the RUN position, the module carries out a preliminary electrical check. At approximately 20 km/h (12 mph), the hydraulic pump motor is turned on for approximately 0.5 second. Any malfunction of the ABS disables the ABS and the anti-lock brake warning indicator illuminates. However, the power-assist braking system still functions normally.

The ABS module needs to be reconfigured whenever a new ABS module is installed. Follow the WDS or equivalent Tester directions for the configuration procedure.

The electronic brake distribution force controls the rear brake pressure and acts as an electronic proportioning valve. It is controlled by the ABS module. When the electronic brake force distribution is disabled, the amber ABS warning indicator illuminates.

Using a specially developed pressure/pedal movement mechanism, the panic assist braking functions by fully applying the brakes during a panic stop. Depending on the vehicle speed, if a pedal stroke is more rapid than normal, the brake booster automatically applies full brake boost. Panic assist is disabled when the driver releases the brake pedal.

 
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