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 Aviator RWDFACTORY OEM SERVICE PROCEDURE
Navigation System Module
NAVIGATION SYSTEM MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B2103 | Antenna Not Connected | Navigation System Module | Go To PINPOINT TEST B . |
| B2403 | Audio CDDJ Internal Fault | Navigation System Module | REMOVE the audio unit and SEND it to an authorized audio system repair facility. TEST the system for normal operation. |
| B2404 | Audio Steering Wheel Switch Circuit Fault | Navigation System Module | Go To PINPOINT TEST F |
| B2913 | Subwoofer Not Connected | Navigation System Module | Go To PINPOINT TEST L . |
| U2003 | Audio Compact Disc/Disc Jockey is Not Responding | Navigation System Module | Not applicable. The vehicle is not equipped with CD/DJ. |
| U2005 | Rear Integrated Control Panel Unit is Not Responding | Navigation System Module | Not applicable. The vehicle is not equipped with rear integrated control panel. |
| U2026 | Family Entertainment System Not Responding | Navigation System Module | Go To PINPOINT TEST H . |
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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