Electronic Brake Control Module: Description and Operation

The Electronic Brake Control Module (EBCM) is located on the underside of the instrument panel on the driver's seat side.

NOTE: There is no serviceable or removable PROM. The EBCM must be replaced as an assembly.

The EBCM monitors the speed of each wheel. If any wheel begins to approach lock-up and the brake switch is closed (brake pedal depressed), the EBCM controls the motors and solenoids to reduce brake pressure to the wheel approaching lockup. Once the wheel regains traction, brake pressure is increased until the wheel again begins to approach lock-up. This cycle repeats until either the vehicle comes to a stop, the brake pedal is released or no wheels approach lock-up. Additionally, the EBCM monitors itself, each input (except the serial data link) and each output for proper operation. If any system malfunction is detected, the EBCM will store a DTC in nonvolatile memory (DTCs will not disappear if the battery is disconnected).