General Description

EBTCM/BPMV:

OPERATION
The primary functions of the Electronic Brake (and 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. The EBCM/EBTCM also controls the display of ABS and "Traction Control" diagnostic trouble codes (DTCs) while in diagnostic mode. The EBCM/EBTCM continuously checks the speed of each wheel to determine if any wheel is beginning to lock. 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. 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. For further information regarding ABS self diagnosis and EBCM/EBTCM trouble codes.Testing and Inspection

PUMP MOTOR RELAY AND SOLENOID VALVE RELAY
The pump motor relay provides power to the pump motor during "Antilock" braking and "Traction Control." The Solenoid Valve Relay provides power to the solenoid valves in the Brake Pressure Modulator Valve (BPMV). Both of these relays are an integral part of the EBCM/EBTCM and cannot be serviced separately.