Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Normal Operation
The traction control portion of the AdvanceTrac® can be disabled by pressing the traction control switch located on the instrument panel center finish panel. When the system is disabled, the sliding car OFF icon in the Instrument Panel Cluster (IPC) illuminates continuously. On MKZ vehicles, the traction control switch is part of the Front Controls Interface Module (FCIM). On Fusion and Milan vehicles, the traction control switch is part of the ambient lighting switch.
The IPC sends 5 volts to the traction control switch along circuit CCA15 (YE/GY). When the traction control switch is pressed, this voltage is sent through the switch and to ground along circuit GD116 (BK/VT). When the IPC detects this ground, it sends a message to the PCM and the ABS module along the High Speed Controller Area Network (HS-CAN) bus that the driver has disabled the system. An open circuit or a defective traction control switch prevents the system from being disabled, but does not set a DTC.
If a MyKey™ restricted key is in use with Advance Trac® always-on feature configured to "on", the traction control system cannot be disabled. An admin key must be used in order to enable and disable the traction control system.
DTC C0089:11 (TCS Disable Switch: Circuit Short to Ground) - If the IPC detects the ground signal during the on-demand self test or if it is shorted to ground, DTC C0089:11 sets. Also, if the traction control switch is held or stuck closed for more than 2 minutes during normal operation, DTC C0089:11 sets.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Traction control switch
- IPC
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.