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
Electronic Features
NAVIGATION SYSTEM MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1627 | PRNDL Reverse Input Circuit Failure | Navigation System Module | Go To PINPOINT TEST K . |
| B2204 | GPS Antenna Connection Open or Short | Navigation System Module | Go To PINPOINT TEST C . |
| B2208 | Navigation to Head Unit Communication Error | Navigation System Module | Go To PINPOINT TEST J . |
| B2633 | Driver-Front Microphone Circuit Failure | Navigation System Module | Go To PINPOINT TEST L . |
| C1192 | Vehicle Speed Circuit Failure | Navigation System Module | Go To PINPOINT TEST D . |
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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