Traction Control

PURPOSE
Traction control will not have any effect on the operation of the vehicle until the control module detects one or both of the front wheels rotating faster than the rear wheels. At this time the Electronic Brake Traction Control Module (EBTCM) will request the Powertrain Control Module (PCM) to reduce the amount of torque applied to the drive wheels.

OPERATION
It does this by retarding timing, cutting power to fuel injectors, turning off the supercharger (if equipped), and the EBTCM will apply the front brakes, thus reducing torque to the front wheels. Once the front wheels begin to rotate at the same speed as the rear wheels, the system will return full control to the driver. During Traction Control System (TCS), if the brake is applied to only one front wheel, most of the torque from the engine will be directed to the other front wheel which will improve the traction of the vehicle. The braking is accomplished by closing the TCS Master Cylinder Isolating Valves, this isolates the master cylinder from the rest of the system. The TCS Prime valves open to allow the pump to get brake fluid to build pressure for braking. The drive wheel circuit solenoids are energized as needed to allow for pressure hold, pressure increase, or pressure decrease. The TCS may be deactivated by the driver if desired. In order to deactivate the TCS with the engine running, depress the "Traction Control" disable switch. This will cause the "TRACTION OFF" lamp in the instrument cluster to illuminate. The system will remain deactivated until the ignition switch is cycled, or the switch is pressed again.