Traction Control Module: Description and Operation

PURPOSE
The The Electronic Brake Control Module (EBCM) is a small control computer, which monitors the speed of each wheel and the electrical status of the hydraulic modulator. The primary functions of the EBCM are to detect wheel locking tendencies, control the brake system while in antilock mode and monitor the system for proper electrical operation. The EBCM also controls display of ABS diagnostic trouble codes while in diagnostic mode.




OPERATION
The EBCM continually checks the speed of each wheel to determine if any wheel is beginning to lock. If a wheel locking tendency is detected, the EBCM commands appropriate valve positions to modulate brake fluid pressure in some or all of the hydraulic circuits to prevent wheel lockup and provide optimum braking. The EBCM continues to control pressure in individual hydraulic circuits until a locking tendency is no longer present.



DIAGNOSTIC NOTES
The Antilock Brake System (ABS) is electronically monitored by the EBCM for proper operation. If the EBCM detects an error, it can disable the antilock function and turn on the amber Antilock warning light in the instrument panel.