Circuit Description

Traction Control System (TCS) switch circuit provides a ground input to BCM when switch is pressed. This input allows BCM to detect a TCS on or off request. If BCM detects a ground on traction control switch signal circuit with TCS OFF, BCM will send a message on serial data line to EBTCM to turn TCS on. If BCM detects a ground after TCS is on, BCM will send a second message to EBTCM to turn TCS off. BCM monitors TCS switch circuit and determines how long a ground has been applied. If ground is applied for longer than expected, a malfunction is present and a DTC will set.

DTC sets when BCM detects a ground on TCS switch signal circuit for longer than 60 seconds.