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 MANUALSMERCURY2011MARINER PREMIER, 2.5 7, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXSEAT SYSTEM DTCSHVAC MODULE
2011 Mercury Mariner Premier, 2.5 7, AWD
HVAC Module
2011 Mercury Mariner Premier, 2.5 7, AWDSECTION HVAC Module
HVAC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B1030:12 | Left Front Seat Heater: Circuit Short to Battery | Go to PINPOINT TEST C . |
| B1030:14 | Left Front Seat Heater: Circuit Short to Ground or Open | Go to PINPOINT TEST C . |
| B1032:12 | Right Front Seat Heater: Circuit Short to Battery | Go to PINPOINT TEST D . |
| B1032:14 | Right Front Seat Heater: Circuit Short to Ground or Open | Go to PINPOINT TEST D . |
| B12AB | Drivers Heated Seat Relay Drive Circuit Shorted to Battery Voltage | Go to PINPOINT TEST C . |
| B12AC | Drivers Heated Seat Relay Drive Circuit Open or Shorted to Ground | Go to PINPOINT TEST C . |
| B12AD | Passenger Heated Seat Relay Drive Circuit Shorted to Battery Voltage | Go to PINPOINT TEST D . |
| B12AE | Passenger Heated Seat Relay Drive Circuit Open or Shorted to Ground | Go to PINPOINT TEST D . |
| All Other DTCs | - | Refer to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULE article. |
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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.