Circuit Description

The traction control switch is a momentary-contact, normally-open switch that can be used to disable the engine torque management function of the traction control system (TCS). On 2-wheel drive or all wheel drive vehicles, the traction control switch is directly monitored by the electronic brake control module (EBCM). On 4-wheel drive vehicles equipped with selectable 4 LO, the traction control switch is monitored by the transfer case shift control module (TCSCM), which sends the traction control switch status information to the EBCM on the serial data link. Each time the traction control switch is pressed, the vehicle stability enhancement system (VSES) and TCS enabled/disabled status changes. When TCS is disabled, the EBCM sends serial data messages to the instrument panel cluster (IPC) to turn ON the traction OFF indicator and display the stability system disabled message.