Engine Only Traction Assist

Some vehicles may be equipped with an engine only traction control (EOTC) system. In order to achieve maximum traction, the EOTC system is designed to limit wheel spin by modulating engine torque when driving on slippery or loose surfaces. Engine torque modulation is achieved by regulating fuel and spark to the cylinders. This means that the traction control system is controlled by the PCM and not the ABS module. The only function of the ABS module in an EOTC system is to provide wheel speed information to the PCM along the high-speed controller area network (HS-CAN) bus. The PCM uses the wheel speed information to determine when traction control is needed.

The traction assist system can be disabled by pressing the stability/traction control switch (located on the instrument panel center finish panel) and is indicated by the yellow traction control indicator on the instrument cluster. The traction assist system will reset and return to normal operation when the ignition switch is cycled or when the switch is pressed and released a second time during the same ignition cycle.

The traction assist system is contained in the PCM and is configured when the PCM is configured. Refer to Programmable Module Installation in MODULE CONFIGURATION article.