Electronic Brake Control Module: Description and Operation

CONTROLLER ANTILOCK BRAKE (CAB)

The Controller Antilock Brake (CAB) is mounted to the Hydraulic Control Unit (HCU) and operates the ABS system.

The CAB is mounted directly to the Hydraulic Control Unit (HCU) that includes a microprocessor and twelve solenoids that control valves that control brake pressure during antilock braking or traction control events. The CAB also has circuits that monitor the following:
- Double brake switch outputs are monitored to determine whether or not to prepare for possible ABS braking
- Wheel Speed Sensors are monitored to determine when a wheel is tending to lock up. The CAB will operate the valves in the HCU to control braking pressure during ABS braking
- Detect ABS system related problems and take diagnostic action
- Able to execute self-tests and output control commands