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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMERCURY2009MARINER HYBRID, AWDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEX - (HYBRID)SEATING DTCS
2009 Mercury Mariner Hybrid, AWD
Seating DTCS
2009 Mercury Mariner Hybrid, AWDSECTION Seating DTCS
HVAC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B12AB | Drivers Heated Seat Relay Drive Circuit Shorted to Battery Voltage | GO to PINPOINT TEST G . |
| B12AC | Drivers Heated Seat Relay Drive Circuit Open or Shorted to Ground | GO to PINPOINT TEST G . |
| B12AD | Passenger Heated Seat Relay Drive Circuit Shorted to Battery Voltage | GO to PINPOINT TEST H . |
| B12AE | Passenger Heated Seat Relay Drive Circuit Open or Shorted to Ground | GO to PINPOINT TEST H . |
| All Other DTCs | - | REFER to MULTIFUNCTION ELECTRONIC MODULES . |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.