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 MANUALSMERCURY2009MILAN BASE, 2.3 Z, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCEREMOVE, OVERHAUL & INSTALLELECTRONIC ENGINE CONTROL - 2.3REMOVAL AND INSTALLATIONPOWERTRAIN CONTROL MODULE (PCM)INSTALLATION
2009 Mercury Milan Base, 2.3 Z, Standard
Powertrain Control Module (PCM): Installation
2009 Mercury Milan Base, 2.3 Z, StandardSECTION Installation
- Install the PCM and the 4 bolts.
- Tighten to 8 Nm (71 lb-in).
- Connect the 2 PCM electrical connectors.
- Install the battery tray. For additional information, refer to BATTERY, MOUNTING AND CABLES article.
- Restore the module configuration. Carry out the module configuration restore steps of the Programmable Module Installation (PMI) procedure. For additional information, refer to MODULE CONFIGURATION article.
- Reprogram the Passive Anti-Theft System (PATS). Carry out the Parameter Reset procedure. For additional information, refer to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) 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.