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.
2001 Lincoln LS 3.9 AFACTORY OEM SERVICE PROCEDURE
Power Windows DTCS
DRIVER'S DOOR MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1342 | ECU Defective | Using new generation star tester, clear and document all DTCs. Perform Driver's Door Module (DDM) self-test. If DTC B1342 is retrieved again, replace DDM. See DRIVER'S DOOR MODULE |
| B1400 | Driver's Window One-Touch Down Window Relay Circuit Short To Voltage | Q |
| B1405 | Driver's Power Window Down Circuit Short To Voltage | F |
| B1408 | Driver's Power Window Up Circuit Short To Voltage | F |
| B1416 | Left Rear Power Window Motor Circuit Short To Voltage | N |
| B1420 | Passenger's Power Window Motor Circuit Short To Voltage | H |
| B1424 | Right Rear Power Window Motor Circuit Short To Voltage | K |
FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1342 | ECU Defective | Using NGS tester, retrieve and document all DTCs. Perform Front Electronic Module (FEM) self-test. If DTC B1342 is retrieved again, replace FEM. See FRONT ELECTRONIC MODULE . |
| B2214 | Passenger's Front Window Up Switch Short To Voltage | G |
| B2215 | Passenger's Front Window Down Switch Short To Voltage | G |
REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1342 | ECU Defective | Using NGS tester, clear and document all DTCs. Perform Rear Electronic Module (REM) self-test. If DTC B1342 is retrieved again, replace REM. See REAR ELECTRONIC MODULE . |
| B2174 | Left Rear Window Remote Up Switch Short To Voltage | M |
| B2178 | Left Rear Window Remote Down Switch Short To Voltage | M |
| B2190 | Right Rear Window Remote Up Switch Short To Voltage | J |
| B2194 | Right Rear Window Remote Down Switch Short To Voltage | J |
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.