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 AWDFACTORY OEM SERVICE PROCEDURE
Audio Unit
AUDIO UNIT DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU is Defective | Audio Unit | CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B1342 is retrieved again REMOVE the audio unit and SEND it to an authorized audio system repair facility. TEST the system for normal operation. |
| B2401 | Audio Tape Deck Mechanism Fault | Audio Unit | VERIFY that no cassette is inserted in the audio unit. CLEAR and DOCUMENT the DTCs. CARRY OUT the self-test. If DTC B2401 is retrieved again, 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 | Audio Unit | Go To Pinpoint Test F . |
| B2405 | Audio Single-Disc CD Player Thermal Shutdown Fault | Audio Unit | Not applicable. |
| B2406 | Audio Single-Disc CD Player Internal Fault | Audio Unit | Not applicable. |
| U2014 | Audio Subwoofer Unit is Not Responding-CDX6 | Audio Unit | Go To Pinpoint Test E . |
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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