Regal V6-3.8L VIN K (1997)
Electronic Brake Control Module: Description and Operation
Antilock Brake System (ABS) and Enhanced Traction System (ETS)
The controlling element of Antilock Brake System (ABS) VI is a microprocessor based Electronic Brake Control Module/Electronic Brake Traction
Control Module (EBCM/EBTCM). Inputs to the system include four wheel speed sensors, the brake switch, ignition switch, and unswitched battery
voltage. Outputs include three bidirectional motor controls, four indicator controls, two solenoid controls, and the system enable relay. A serial data line,
located in terminal 9 of the Data Link Connector (DLC), is provided for service diagnostic tools and assembly plant testing.
The EBCM/EBTCM monitors the speed of each wheel. If any wheel begins to approach lock-up and the brake switch is on, the EBCM/EBTCM 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/EBTCM monitors itself, each input (except the serial data line) and each output for proper operation. If any system
malfunction is detected, the EBCM/EBTCM will store a DTC in nonvolatile memory (DTCs will not disappear if the battery is disconnected). Refer to
"Self-Diagnostics" for more detailed information. See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection
NOTICE: There is no serviceable or removable PROM. The EBCM/EBTCM must be replaced as an assembly.
