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 MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1335 (INFORMATION SYSTEM AND ENTERTAINMENT SYSTEM)DIAGNOSTIC TESTSINFORMATION & ENTERTAINMENT SYSTEMSYMPTOM CHART

2010 Mercury Mariner Hybrid, AWD

Symptom Chart

2010 Mercury Mariner Hybrid, AWDSECTION Symptom Chart

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the rear audio and temperature control (RATC) module	Fuse Wiring, terminals or connectors RATC module	REFER to MODULE COMMUNICATIONS NETWORK article.
The cassette player is inoperative	Audio unit	INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
The CD player/changer is inoperative/does not operate correctly	Audio unit	INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
Poor reception	Antenna Antenna cable Noise suppression equipment Charging system Ignition system Audio unit	Go to Pinpoint Test A .
Continuous seek/scan in AM/FM	Antenna cable Antenna Audio unit	Go to Pinpoint Test A .
Poor quality/distorted/no sound from one or more speakers (not all speakers)	Wiring, terminals or connectors Speaker Audio unit	Go to Pinpoint Test B .
Poor quality/distorted/no sound from all speakers	Wiring, terminals or connectors Audio unit	CHECK circuit 1000 (RD/BK) for voltage with the key in any position except START. If voltage is present, REPAIR the circuit. TEST the system for normal operation. If no voltage is present, INSTALL a new audio unit. REFER to Audio Unit . TEST the system for normal operation.
The subwoofer is inoperative	Fuse Wiring, terminals or connectors Subwoofer amplifier Audio unit	Go to Pinpoint Test D .
Loud popping sound when cycling the ignition switch	Fuse Wiring, terminals or connectors Subwoofer amplifier Audio unit	Go to Pinpoint Test C .
The audio unit illumination is inoperative	Wiring, terminals or connectors Audio unit	REFER to INSTRUMENT CLUSTER & PANEL ILLUMINATION article.
The steering wheel controls are inoperative	Wiring, terminals or connectors Clockspring Audio unit Steering wheel controls	Go to Pinpoint Test E .
The rear auxiliary audio controls are inoperative/do not operate correctly	Wiring, terminals or connectors Rear auxiliary audio controls RATC module Audio unit	Go to Pinpoint Test F .

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.