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 MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1031 (MODULE COMMUNICATIONS NETWORK)
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
Section 1031 (Module Communications Network)
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Section 1031 (Module Communications Network)
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Description And Operation
- Diagnosis And Testing
- Communications Network
- Notes
- Special Tool(s)
- Principles of Operation
- Inspection and Verification
- Communications Network Diagnostic Trouble Code (DTC) Index
- System Precheck
- Symptom Chart
- Connector Circuit Reference
- Anti-Lock Brake System (ABS) Module C155
- Powertrain Control Module (PCM) C175b
- Instrument Cluster C220a
- Instrument Cluster C220b
- Electronic Automatic Temperature Control (EATC) C228b
- Data Link C251
- Restraint Control Module (RCM) C310a
- Driver Seat Module (DSM) C341e
- Driver Seat Module (DSM) C341g
- Vehicle Security Module C3203d
- Vehicle Security Module C3203e
- Vehicle Security Module C3203f
- Tire Pressure Monitoring System Module C3183
- Parking Aid Module C4014
- Pinpoint Test A: The Vehicle Security Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test B: The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test C: The Restraints Control Module (RCM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test D: The Tire Pressure Monitoring System Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test E: The Anti-Lock Brake System (ABS) Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test F: The Parking Aid Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test G: The Powertrain Control Module (PCM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test H: The Instrument Cluster Does Not Respond To The Diagnostic Tool
- Pinpoint Test I: The Electronic Automatic Temperature Control (EATC) Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test J: No Controller Area Network (CAN) Communication
- Pinpoint Test K: No International Standards Organization (ISO) 9141 Communications Network Communication
- Pinpoint Test L: No Universal Asynchronous Receiver-Transmitter (UART) Based Protocol (UBP) Communications Network Communication
- Pinpoint Test M: No Module/Network Communication - No Voltage To The Diagnostic Tool
- Communications Network
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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.