General Information

The Antilock Brake System and the Enhanced Traction System (ABS/ETS) are both part of the same hydraulic and electric system. Both systems use many of the same components and a problem in either system may disable the other system until it is repaired. Antilock braking controls wheel slip when braking. The ETS provides the capability to control wheel spin at the driven wheels. This improves the ability to maintain vehicle stability and acceleration (drive traction) under changing road and vehicle load conditions.

The ABS and the ETS share the same wheel speed sensors and Electronic Brake Traction Control Module (EBTCM). When the front wheel spin exceeds a given limit, ETS becomes active. The EBTCM determines the desired wheel torque to minimize front wheel spin. This information is sent to the Powertrain Control Module (PCM) via the serial data link. The PCM then calculates and employs control of wheel slip/wheel torque.