Description & Operation
Hydraulic brake system has power assisted dual piston master cylinder with diagonally split disc brakes in front and drum brakes in rear. Wheel speed sensors signal ABS control module, which allows ABS hydraulic actuator to control braking effort on separate brakes to control tendency to skid during a stop. A dual load spring valve is located on rear axle. When vehicle is unloaded, valve closes partially reducing pressure to rear brakes. As vehicle is loaded, valve opens gradually until full pressure is supplied for a full load. See Fig 1 .
NOTE:
For Anti-lock Brake system diagnosis, see appropriate
ANTI-LOCK article.