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.
2003 Mercury MarauderFACTORY OEM SERVICE PROCEDURE
Section 248 (Module Communications Network)
WARNING: This page is about a different car, the 2003 Mercury Mountaineer and 2003 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Component Location
- Specifications
- Description And Operation
- Communications Network
- Powertrain Control Module (PCM)
- 4-wheel Anti-Lock Brake (4WABS) Control Module
- Restraint Control Module (RCM)
- Electronic Automatic Temperature Control (EATC) Module
- Instrument Cluster
- Tire Pressure Monitor Module
- Driver Seat Module (DSM)
- Vehicle Security Module
- Parking Aid Module
- 4-Wheel Drive (4WD) Control Module
- Principles of Operation
- Module Configuration
- Module Controlled Functions
- Communications Network
- Diagnosis And Testing
- Diagnostic Trouble Code Chart
- Communications Network
- Notes
- Special Tool(s)
- Inspection and Verification
- System Precheck
- Symptom Chart
- Connector Circuit Reference
- Data Link C251
- Vehicle Security Module C3008f
- 4-Wheel Drive (4WD) Control Module C281b
- Driver Seat Module (DSM) C341g
- Parking Aid Module C4014
- Restraint Control Module (RCM) C310a
- In-line C126M, C126F
- In-line C3050M, C3050F
- In-line C2108M, C2108F
- In-line C263M, C263F
- In-line C408M,C408F
- In-line C2095M,C2095F
- Instrument Cluster C220b
- Electronic Automatic Temperature Control (EATC) C228b
- Tire Pressure Monitor Module C3183
- Powertrain Control Module (PCM) C175a
- ABS/TC Module or Stability Assist Module C155
- Pinpoint Tests
- Pinpoint Test A: The Vehicle Security Module Does Not Respond To The Diagnostic Tool.
- Pinpoint Test B: The 4-Wheel Drive (4WD) Control Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test C: The Restraint Control Module (RCM) Does Not Respond To The Diagnostic Tool
- Pinpoint Test D: The Tire Pressure Monitor Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test E: The Driver Seat Module (DSM) 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: The ABS/TC Module or Stability Assist Module Does Not Respond To The Diagnostic Tool
- Pinpoint Test K: No Standard Corporate Protocol (SCP) Network Communication
- Pinpoint Test L: No International Standards Organization (ISO) 9141 Network Communication
- Pinpoint Test M: No UART Based Protocol (UBP) Network communication
- Pinpoint Test N: The Instrument Cluster Does Not Respond To The Diagnostic Tool (UBP)
- Pinpoint Test O: No Module/Network Communication - No Power To The Diagnostic Tool
- Driver Seat Module (DSM)
- Vehicle Security Module
- Removal And Installation
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.