EBCM

DESCRIPTION
The controlling element of ABS VI is a microprocessor based Electronic Brake Control Module, or EBCM. Inputs to the system include four wheel speed sensors, the stoplamp swftch, ignition switch, and unswitched battery voltage. Outputs include three bi-directional motor controls, two solenoid controls, the ABS relay and the lamp driver module. A serial data line is used for service diagnostic tools (Tech 2 scan tool).

OPERATION
The EBCM monitors the speed of each wheel. If any wheel begins to approach lock-up, the EBCM controls the motors and solenoids to reduce brake pressure to the wheel approaching lock-up. 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 is released, or no wheels approach lock-up. Additionally, the EBCM monitors itself, each input 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). Refer to Self-Diagnostics in this section for more detailed information. The EBCM is located on the right front passenger side floor near -the bulkhead (cowl), underneath the cat~)et.