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.
Inspection and Verification
2010 Mercury Mariner Hybrid, AWDSECTION Inspection and Verification
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.
- Verify the customer's concern by operating the climate control system to duplicate the condition.
- Inspect to determine if one of the following mechanical or electrical concerns apply:VISUAL INSPECTION CHART
Mechanical Electrical - Loose, missing or damaged A/C compressor drive belt
- Loose or disconnected A/C clutch
- Broken or binding door/actuator
- Broken or leaking refrigerant lines
- Obstructed in-vehicle temperature sensor
- Disconnected in-vehicle temperature aspirator hose
- Open fuses
- Blower motor inoperative
- A/C compressor inoperative
- Circuitry open/shorted
- Disconnected electrical connectors
- Cooling fan inoperative
- As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting or incorrectly installed component, module and in-line electrical connectors and pins.
- If the inspection reveals obvious concerns that can be readily identified, repair as necessary.
- If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the vehicle selection cannot be entered:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- check that the battery voltage is greater than 9V.
If the diagnostic tool still does not allow the vehicle selection to be entered, refer to the diagnostic tool manual.
- CARRY OUT the Data Link Diagnostic Test using the diagnostic tool. If the scan tool responds with:
- SCP+, SCP-, CAN or UBP circuits fault = ALL MODULE NO RESPONSE/NOT EQUIPPED, go to Module Communication Network Diagnostics to diagnose the network concern.
- If the powertrain control module (PCM) is not listed for a communication concern, turn the A/C controls to OFF and execute the self-test diagnostics for the PCM.
- If the EATC module is not listed for a communication concern, execute the self-test diagnostics for the EATC module.
- If any PCM or EATC DTCs are retrieved, and are related to the concern, go to the POWERTRAIN CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX or the DUAL AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX to continue the diagnostics.
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART to continue the diagnostics.
- If the EATC module cannot be accessed by the scan tool, GO to PINPOINT TEST E .
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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.