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 MANUALSLINCOLN2008NAVIGATOR 4WD V8-5.4LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
2008 Lincoln Navigator 4WD V8-5.4L
Engine Control Module: Service and Repair
2008 Lincoln Navigator 4WD V8-5.4LSECTION Service and Repair
POWERTRAIN CONTROL MODULE (PCM)
Removal
1. Retrieve the module configuration. Carry out the module configuration retrieval steps of the Programmable Module Installation procedure.
2. Disconnect the battery ground cable.
3. Disconnect the 2 PCM electrical connectors.
4. Remove the 2 bolts and the ground cable.
- To install, tighten to 7 Nm (62 lb-in).
5. Remove the PCM.
6. To install, reverse the removal procedure.
Installation
1. Install the PCM.
2. Position the ground cable and install the 2 bolts.
- Tighten to 7 Nm (62 lb-in).
3. Connect the 3 PCM electrical connectors.
4. Connect the battery ground cable.
5. NOTE:
- When a new PCM is installed, the air bag warning indicator will illuminate when the ignition switch is ON. The warning indicator will remain on until PCM configuration is restored.
- Clear all restraints control module (RCM) continuous DTCs after Programmable Module Installation procedure has been completed on the PCM.
Restore the module configuration. Carry out the module configuration restore steps of the Programmable Module Installation procedure.
Removal
1. Retrieve the module configuration. Carry out the module configuration retrieval steps of the Programmable Module Installation procedure.
2. Disconnect the battery ground cable.
3. Disconnect the 2 PCM electrical connectors.
4. Remove the 2 bolts and the ground cable.
- To install, tighten to 7 Nm (62 lb-in).
5. Remove the PCM.
6. To install, reverse the removal procedure.
Installation
1. Install the PCM.
2. Position the ground cable and install the 2 bolts.
- Tighten to 7 Nm (62 lb-in).
3. Connect the 3 PCM electrical connectors.
4. Connect the battery ground cable.
5. NOTE:
- When a new PCM is installed, the air bag warning indicator will illuminate when the ignition switch is ON. The warning indicator will remain on until PCM configuration is restored.
- Clear all restraints control module (RCM) continuous DTCs after Programmable Module Installation procedure has been completed on the PCM.
Restore the module configuration. Carry out the module configuration restore steps of the Programmable Module Installation procedure.
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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.