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HOMESERVICE MANUALSMERCURY2010MARINER HYBRID, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 970 (CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - (EXCEPT HYBRID))DIAGNOSTIC TESTSCLIMATE CONTROL SYSTEMINSPECTION AND VERIFICATION
2010 Mercury Mariner Hybrid, AWD

Inspection and Verification

2010 Mercury Mariner Hybrid, AWDSECTION Inspection and Verification
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the customer concern.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • A/C compressor
    • A/C compressor drive belt
    • A/C clutch
    • Vacuum lines
    • Vacuum control motor
    • Refrigerant lines
    • Coolant level
    • Heater hoses
    • Radiator
    • Condenser
    • Suction accumulator
    • Battery junction box (BJB) fuses:
      • 14 (15A)
      • 18 (40A)
    • Smart junction box (SJB) fuse 26 (5A)
    • Engine cooling fans
    • Blower motor
    • Circuitry
  3. As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting or incorrectly installed component, module or in-line electrical connectors and pins.
    4. NOTE: Make sure to use the latest scan tool software release.
  4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
    5. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  5. If the scan tool does not communicate with the VCM:
    • check the VCM connection to the vehicle.
    • check the scan tool connection to the VCM.
    • refer to MODULE COMMUNICATIONS NETWORK article, No power to the scan tool, to diagnose no communication with the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • verify the ignition key is in the ON position.
    • verify scan tool operation with a known good vehicle.
    • refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
  7. Carry out the network test:
    • If the scan tool responds with no communication from one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
    • If the network test passes, retrieve and record the continuous memory diagnostic trouble codes (DTCs).
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the powertrain control module (PCM).
    9. NOTE: Some PCM DTCs may inhibit air conditioning (A/C) operation. If any PCM DTCs are retrieved, diagnose those first. Refer to Introduction - Gasoline Engines article.
  9. If the DTCs retrieved are related to the concern, go to the Introduction - Gasoline Engines article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
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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.