Antilock Brake System (ABS)

1500/2500/3500

The antilock brake system (ABS) is an electronically operated, four channel brake control system which is part of Electronic Stability Control (ESC). The vehicle also has Electronic Variable Brake Proportioning (EVBP) designed into the system which eliminates the combination/proportioning valve.

The system is designed to prevent wheel lockup and maintain steering control during braking. Preventing lockup is accomplished by modulating fluid pressure to the wheel brake units.

The hydraulic system is a four channel design. All wheel brakes are controlled individually. The ABS electrical system is separate from other electrical circuits in the vehicle. A specially programmed controller antilock brake unit operates the system components.

ABS system major components include:

- Antilock Brake Module (ABM)

- Hydraulic Control Unit (HCU)

- Wheel Speed Sensors (WSS)

- ABS Warning Light