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 1376 (ENGINE CONTROLS - SYMPTOM CHARTS (HYBRID))QT: POWERTRAIN CONTROL MODULE (PCM)/TRANSAXLE CONTROL MODULE (TCM) QUICK TESTQT1 CARRY OUT THE NETWORK TEST
2010 Mercury Mariner Hybrid, AWD
Qt1 Carry Out The Network Test
2010 Mercury Mariner Hybrid, AWDSECTION Qt1 Carry Out The Network Test
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
TO PREVENT THE RISK OF HIGH-VOLTAGE SHOCK, ALWAYS FOLLOW PRECISELY ALL WARNINGS AND SERVICE INSTRUCTIONS, INCLUDING INSTRUCTIONS TO DEPOWER THE SYSTEM. THE HIGH-VOLTAGE HYBRID SYSTEM UTILIZES APPROXIMATELY 300 VOLTS DC, PROVIDED THROUGH HIGH-VOLTAGE CABLES TO ITS COMPONENTS AND MODULES. THE HIGH-VOLTAGE CABLES AND WIRING ARE IDENTIFIED BY ORANGE HARNESS TAPE OR ORANGE WIRE COVERING. ALL HIGH-VOLTAGE COMPONENTS ARE MARKED WITH HIGH-VOLTAGE WARNING LABELS WITH A HIGH-VOLTAGE SYMBOL. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN SERIOUS PERSONAL INJURY OR DEATH.
- Carry out all the safety steps required to run the vehicle tests.
- Complete the preliminary checks looking for obvious concerns that may relate to the symptom. Check items such as those listed:
- fuses
- electrical circuits and connectors
- vacuum lines (leaks, routing)
- air intake system (leaks, restrictions)
- fuel quality (octane, contamination, winter/summer blend)
- engine cooling system (engine operating at correct temperature)
- motor electronics cooling system
- Access any related OASIS or TSB information.
- Carry out the network test.
NOTE:
If the scan tool being used does not support the network test, an alternative method is to attempt communication with each module on the controller area network (CAN) link.
Does the network test pass?
| Yes | No |
|---|---|
| GO to QT2 . | If only the PCM or the TCM has a communication concern: GO to PINPOINT TEST QA . All others: GO to the MODULE COMMUNICATIONS NETWORK , to diagnose the network concern. |
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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.