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 549 (AUTOMATIC TRANSMISSION - CVT)DIAGNOSIS AND TESTINGPINPOINT TESTS - NON OSC EQUIPPED VEHICLEPINPOINT TESTSPINPOINT TEST H: TRANSMISSION CONTROL MODULE SIGNAL
2010 Mercury Mariner Hybrid, AWD
Pinpoint Test H: Transmission Control Module Signal
2010 Mercury Mariner Hybrid, AWDSECTION Pinpoint Test H: Transmission Control Module Signal
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
- H1 TRANSMISSION CONTROL MODULE SIGNAL OUT OF RANGE
- Check to make sure the transaxle harness connector is fully seated, pins are fully engaged in connector and in good condition before proceeding.
- Connect the scan tool.
- Key in ON position.
- Monitor PID: Ignition
- Is the ignition voltage between 11 and 15 volts.
Yes: GO to H2.
No: REPAIR the open or short circuit harness side.
- H2 TRANSMISSION CONTROL MODULE SIGNAL OUT OF RANGE
- PID: VPWRTCM
- Is the operating voltage between 11 and 15 volts.
Yes: System operating correctly.
No: Fix other DTCs first. Charge the vehicle battery.
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.