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.
2004 Lincoln Navigator 4WDFACTORY OEM SERVICE PROCEDURE
Section 277 (Module Communications Network)
WARNING: This page is about a different car, the 2003 Lincoln Navigator and 2003 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnosis And Testing
- Communications Network
- Notes
- Special Tool(s)
- Principles of Operation
- Inspection and Verification
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: 4-Wheel Anti-Lock Brake/Traction Control (Abs/Tc) Module Or Stability Assist Module Does Not Respond To Diagnostic Tool (ISO)
- Pinpoint Test B: 4-Wheel Anti-Lock Brake/Traction Control (Abs/Tc) Module Or Stability Assist Module Does Not Respond To Diagnostic Tool (SCP)
- Pinpoint Test C: Restraint Control Module (RCM) Does Not Respond To Diagnostic Tool
- Pinpoint Test D: Vehicle Security Module Does Not Respond To Diagnostic Tool
- Pinpoint Test E: Powertrain Control Module (PCM) Does Not Respond To Diagnostic Tool
- Pinpoint Test F: Electronic Automatic Temperature Control (EATC) Module Does Not Respond To Diagnostic Tool
- Pinpoint Test G: Driver Seat Module (DSM) Does Not Respond To Diagnostic Tool
- Pinpoint Test H: Parking Aid Module Does Not Respond To Diagnostic Tool
- Pinpoint Test I: 4-Wheel Drive (4WD) Control Module Does Not Respond To Diagnostic Tool
- Pinpont Test J: Instrument Cluster Does Not Respond To Diagnostic Tool (SCP)
- Pinpoint Test K: Instrument Cluster Does Not Respond To Diagnostic Tool (UBP)
- Pinpoint Test L: Tire Pressure Monitor Module Does Not Respond To Diagnostic Tool
- Pinpoint Test M: Power Liftgate Module Does Not Respond To Diagnostic Tool
- Pinpoint Test N: Air Suspension Control Module Does Not Respond To Diagnostic Tool
- Pinpoint Test O: Temperature Controlled Seat Module Does Not Respond To Diagnostic Tool
- Pinpoint Test P: No International Standards Organization (ISO) 9141 Network Communication
- Pinpoint Test Q: No Standard Corporate Protocol (SCP) Network Communication
- Pinpoint Test R: No Uart Based Protocol (UBP) Network Communication
- Pinpoint Test S: No Module/Network Communication - No Power To Diagnostic Tool
- Communications Network
Factory Service Tools
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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.
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