Electronic Brake Control Module: Description and Operation

EBTCM/BPMV:

PRIMARY FUNCTIONS
The primary functions of the Electronic Brake/Traction Control Module (EBCM/EBTCM) are to detect wheel slip tendencies, wheel speed differences, control the brake system while in Antilock or Traction Control mode, and monitor the system for proper electrical operation.

Control Of Diagnostic Trouble Codes
The EBCM/EBTCM also controls the display of "ABS" and Traction Control Diagnostic Trouble Codes (DTCs) while in diagnostic mode.

Modulating Brake Fluid Pressure
The EBCM/EBTCM continuously checks the speed of each wheel to determine if any wheel is beginning to slip. If a wheel slip tendency is detected, the EBCM/EBTCM commands appropriate valve positions to modulate brake fluid pressure in some or all of the hydraulic circuits to prevent wheel slip and provide optimum braking. The EBCM/EBTCM continues to control pressure in individual hydraulic circuits until a slipping tendency is no longer present.

Disabling The Systems
The antilock brake system with traction control system is electrically monitored by the EBCM/EBTCM for proper operation. If the EBCM/EBTCM detects an error, it can disable the Antilock and traction control function and turn "ON" the "ABS" and/or "TRACTION OFF" lamps in the instrument cluster.

Vent Tube
Pin 16 of the EBCM/EBTCM harness connector is a plastic vent tube that vents the cavity between the EBCM/EBTCM and the Brake Pressure Modulator Valve (BPMV) to the passenger compartment.