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.

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HOMESERVICE MANUALSMERCURY2011MARINER PREMIER, 2.5 7, AWDREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM - VEHICLE DYNAMIC SYSTEMDIAGNOSIS AND TESTINGANTI-LOCK CONTROL - NON-HYBRIDSYMPTOM CHART

2011 Mercury Mariner Premier, 2.5 7, AWD

Symptom Chart

2011 Mercury Mariner Premier, 2.5 7, AWDSECTION Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the ABS module	Wiring, terminals or connectors ABS module	REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the no communication problem.
The red brake warning indicator and the yellow ABS warning indicator are both illuminated	DTCs present in the ABS module	REFER to the ABS MODULE DTC CHART in this service information.
The red brake warning indicator is illuminated and the yellow ABS warning indicator is not illuminated	Wiring, terminals or connectors Parking brake Brake fluid level sensor Instrument Cluster (IC) ABS module	REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES to continue diagnosis of the warning indicator.
The yellow ABS warning indicator is never on	Wiring, terminals or connectors IC	REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article to continue diagnosis of the warning indicator.
The stability/traction control indicator is never on	Wiring, terminals or connectors IC ABS module	REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article to continue diagnosis of the indicator.
The stability/traction control indicator flashes once every 2 seconds	Incomplete stability/traction control calibration	CALIBRATE the ABS module. REFER to STABILITY/TRACTION CONTROL SYSTEM SENSOR CALIBRATION in this service information.
Unintended ABS activation at low speeds or near the end of stopping the vehicle	ABS wheel speed sensor tone ring	INSPECT the tone rings for damage. INSTALL new as necessary.
Traction control cannot be disabled	MyKey™-restricted key in use with AdvanceTrac® always-on feature configured to "on" Wiring, terminals or connectors Stability/traction control switch ABS module	GO to PINPOINT TEST H .

RENDER: 1.0x

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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.