Grand Cherokee 2WD Limited V8-4.7L (2002)
Electronic Brake Control Module: Description and Operation
Fig.4 Controller Antilock Brakes
CONTROLLER ANTILOCK BRAKE
The Controller Antilock Brake (CAB) is mounted to the Hydraulic Control Unit (HCU) and operates the ABS system.
The CAB voltage is supplied by the ignition switch in the RUN position. The CAB contains dual microprocessors. A logic block in each
microprocessor receives identical sensor signals. These signals are processed and compared simultaneously. The CAB contains a self check
program that illuminates the ABS warning light when a system fault is detected. Faults are stored in a diagnostic program memory and are
accessible with the DRB III scan tool. ABS faults remain in memory until cleared, or until after the vehicle is started approximately 50 times.
Stored faults are not erased if the battery is disconnected.
