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 1094 (CHARGING SYSTEM - GENERAL INFORMATION)
2010 Mercury Mariner Hybrid, AWD
Section 1094 (Charging System - General Information)
2010 Mercury Mariner Hybrid, AWDSECTION Section 1094 (Charging System - General Information)
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnostic Tests
- Charging System
- Notes
- Principles of Operation
- Inspection and Verification
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: The Battery is Discharged or Battery Voltage is Low
- Pinpoint Test B: The Charging System Warning Indicator is ON With the Engine Running (The Charging System Voltage Does Not Increase)
- Pinpoint Test C: The Charging System Overcharges (Battery Voltage is Greater Than 15.5 Volts)
- Pinpoint Test D: The Charging System Warning Indicator is On With the Engine Running and the Battery Increases Voltage
- Pinpoint Test E: The Charging System Warning Indicator is Off With the Ignition Switch in the RUN Position and the Engine Off
- Pinpoint Test F: The Charging System Warning Indicator Flickers or is Intermittent
- Pinpoint Test G: The Generator is Noisy
- Pinpoint Test H: Radio Interference
- Component Tests
- Charging System - Dual Generators
- Notes
- Principles of Operation
- Inspection and Verification
- Symptom Chart
- Pinpoint Tests
- Notes
- Pinpoint Test I: The Charging System Warning Indicator is On With the Engine Running (The Charging System Voltage Does Not Increase)
- Pinpoint Test J: The Charging System Warning Indicator is Off With the Ignition Switch in the Run Position and the Engine Off
- Pinpoint Test K: The Charging System Warning Indicator is On With the Engine Running and the Battery Increases Voltage
- Pinpoint Test L: The Charging System Warning Indicator Operates Correctly and the Battery Voltage Does Not Increase
- Pinpoint Test M: The Battery is Discharged or Battery Voltage is Low
- Pinpoint Test N: The Charging System Warning Indicator Flickers or is Intermittent
- Pinpoint Test O: The Charging System Overcharges (Battery Voltage is Greater Than 15.5 Volts)
- Pinpoint Test P: Battery Leakage or Damage
- Pinpoint Test Q: The Voltage Gauge Reads High or Low
- Pinpoint Test R: The Generator(s) is Noisy
- Pinpoint Test S: Radio Interference
- Pinpoint Test T: Dual Generator Upper Fault Detected (P0620)
- Pinpoint Test U: Dual Generator Lower Fault Detected (P1148)
- Pinpoint Test V: Dual Generator Lower Circuit Fault Detected (P1149)
- Component Tests
- Charging System
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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.