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 Ford Freestar BaseFACTORY OEM SERVICE PROCEDURE
Section 146 (Module Communications Network)
WARNING: This page is about a different car, the 2002 Ford RV Cutaway, 2002 Ford Econoline, 2002 Ford E450 Super Duty, and 2002 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Description & Operation
- Component Locations
- Repairing Network Communications Wiring
- Self-Diagnostic System
- Diagnostic Trouble Code Definitions
- Parameter Identification & Definitions
- System Tests
- Notes
- Test A: 4-Wheel Anti-Lock Brake System Control Module Does Not Respond To Scan Tool
- Test B: Electronic Crash Sensor Module Does Not Respond To Scan Tool
- Test C: Powertrain Control Module Does Not Respond To Scan Tool
- Test D: Auxiliary Powertrain Control Module Does Not Respond To Scan Tool
- Test E: Natural Gas Vehicle Module Does Not Respond To Scan Tool
- Test F: No Module/Network Communication - ISO 9141 Network
- Test G: No Module/Network Communication - SCP Bus
- Test H: No Module/Network Communication
- Wiring Diagrams
Factory Service Tools
Use the Manual With the Right Hardware
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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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