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.
2005 Lincoln Aviator RWDFACTORY OEM SERVICE PROCEDURE
Vehicle Security Module DTCS
VEHICLE SECURITY MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Action |
|---|---|---|---|
| B1321 | Driver Door Ajar Circuit Open or Short to Battery | Vehicle Security Module | GO to PINPOINT TEST C . |
| B1329 | Passenger Door Ajar Circuit Open or Short to Battery | Vehicle Security Module | GO to PINPOINT TEST C . |
| B1333 | Decklid Ajar Rear Door Circuit Open or Short to Battery | Vehicle Security Module | GO to PINPOINT TEST C . |
| B1337 | RH Rear Door Ajar Circuit Open or Short to Battery | Vehicle Security Module | GO to PINPOINT TEST C . |
| B1342 | ECU is Defective | Vehicle Security Module | CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new vehicle security module. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . CLEAR the DTCs. REPEAT the self-test. |
| B1573 | LH Rear Door Ajar Circuit Open or Short to Battery | Vehicle Security Module | GO to PINPOINT TEST C . |
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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