Electronic Brake Traction Control Module (EBTCM)

The EBTCM is a small, control microprocessor. The EBTCM monitors the speed of each wheel and monitors the electrical status of the brake pressure modulator valve.

The following are the primary functions of the EBTCM:
- To detect the wheel rotating speed differences.
- To control the brake system while in the antilock mode.
- To command torque reduction in the traction control mode.
- To monitor the system for proper electrical operation.

The EBTCM controls the display of the ABS and traction control diagnostic trouble codes while in the diagnostic mode.

The EBTCM contentiously checks the speed of each wheel to determine if any wheel is beginning to lock. The EBTCM commands the appropriate valve positions to modulate the brake fluid pressure in some or all of the hydraulic circuits if a wheel locking tendency is detected. This prevents wheel lockup and provides optimum braking. The EBTCM continues to control the pressure in individual hydraulic circuits until a locking tendency is no longer present. The EBTCM also commands the ECM to perform engine torque reduction and commands the TCM to prevent transmission downshifting during traction control mode.

The ABS with TCS is electrically monitored by the EBTCM for proper operation. If the EBTCM detects an error it disables the antilock and traction control function and turns on the ABS or TC indicator lamps in the instrument cluster. Refer to Self-Diagnostics for further information regarding the ABS self diagnosis and further information regarding the EBTCM DTCs.