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 Lincoln Aviator AWDFACTORY OEM SERVICE PROCEDURE
Lighting Systems DTCS
LIGHTING SYSTEMS (VEHICLE SECURITY MODULE) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Defective | Vehicle Security Module | Refer to MODULE COMMUNICATIONS NETWORK . |
| B1695 | Autolamp On Circuit Failure | Vehicle Security Module | Go To PINPOINT TEST F . |
| B1792 | Autolamp Sensor Input Circuit Short To Battery And Open | Vehicle Security Module | Go To PINPOINT TEST F . |
| B1793 | Autolamp Sensor Input Circuit Short To Ground | Vehicle Security Module | Go To PINPOINT TEST E . |
| B2661 | Parklamp Relay Output Short To VBatt | Vehicle Security Module | If the parking lamps are on continuously, Go To PINPOINT TEST P . If the parking lamps are not on continuously, INSTALL a new vehicle security module. REFER to MODULE COMMUNICATIONS NETWORK . |
| B2662 | Parklamp Relay Output Open Circuit | Vehicle Security Module | Go To PINPOINT TEST N . |
| B2263 | Headlamp Relay Output Short To VBatt | Vehicle Security Module | If the headlamps are on continuously, Go To PINPOINT TEST D . If the headlamps are not on continuously, INSTALL a new vehicle security module. REFER to MODULE COMMUNICATIONS NETWORK . |
| B2664 | Headlamp Relay Output Open Circuit Or Short To Vbatt | Vehicle Security Module | Go To PINPOINT TEST G . |
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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