Normal Operation

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

When the stability/traction control switch is pressed, a ground circuit is momentarily completed. The ABS module detects this ground signal and disables the traction control system. The system is enabled when the switch is pressed a second time or if the ignition switch is cycled.

Circuit CCA15 (YE/GY) connects the ABS module to the stability/traction control switch. The stability/traction control switch is grounded along circuit GD114 (BK/BU). When the switch is pressed, the 2 circuits are momentarily connected and the ABS module receives a ground signal. The ABS module sends a message to the Instrument Cluster (IC) over the High Speed Controller Area Network (HS-CAN) bus to illuminate the stability/traction control indicator. The ABS module will send a message over the HS-CAN bus to the PCM indicating that the wheel-spin will be allowed.

If a MyKey™-restricted key is in use that has the AdvanceTrac® always-on feature configured to "on", the stability control system cannot be disabled.

This pinpoint test is intended to diagnose the following:

Wiring, terminals or connectors
Stability/traction control switch
ABS module