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 202 (ENTERTAINMENT SYSTEM - GENERAL INFORMATION)DIAGNOSIS AND TESTINGAUDIO SYSTEMPINPOINT TESTSPINPOINT TEST A: NO COMMUNICATION WITH THE AUDIO CONTROL MODULETESTING
2010 Mercury Mariner Hybrid, AWD
Pinpoint Test A: No Communication With The Audio Control Module: Testing
2010 Mercury Mariner Hybrid, AWDSECTION Testing
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
- A1 CHECK CIRCUIT 1111 (VT) FOR VOLTAGE
- Disconnect: Audio Control Module C240a.
- Key in ON position.
- Measure the voltage between the audio control module C240a-1, circuit 1111 (VT), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to A2.
- No : REPAIR the circuit. TEST the system for normal operation.
- A2 CHECK CIRCUIT 1204 (BK/OG) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the audio control module C240a-13, circuit 1204 (BK/OG), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : REFER to MODULE COMMUNICATIONS NETWORK to continue network communication diagnosis.
- No : REPAIR the circuit. TEST the system for normal operation.
RENDER: 1.0x
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.