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 Mercury MarauderFACTORY OEM SERVICE PROCEDURE
Entertainment Systems DTC
ENTERTAINMENT SYSTEMS (ACM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU is Defective | ACM | CLEAR and DOCUMENT the DTCS. CARRY OUT the ACM on - demand self-test. REMOVE the ACM and SEND it to an authorized Ford audio system repair facility if DTC B1342 is retrieved again. TEST the system for normal operation. |
| B2401 | Audio Tape Deck Mechanism Fault | ACM | VERIFY that no tape is inserted in the ACM, CLEAR and DOCUMENT the DTCS. CARRY OUT the ACM on-demand self-test. If DTC B2401 is retrieved again, REMOVE the ACM and SEND it to an authorized Ford audio system repair facility, TEST the system for normal operation. |
| B2403 | Audio CD/DJ Internal Fault | ACM | Go To PINPOINT TEST C . |
| B2405 | Audio Single-Disc CD Player Thermal Shutdown Fault | ACM | Not applicable. Vehicle is not equipped with single-disc CD. CLEAR and DOCUMENT DTCs. CARRY OUT ACM self-test. |
| B2406 | Audio Single-Disc CD Player Internal Fault | ACM | Not applicable. Vehicle is not equipped with single-disc CD. CLEAR and DOCUMENT DTCs. CARRY OUT ACM self-test. |
| U2003 | Audio Compact Disc/Disc Jockey is Not Responding | ACM | If equipped with CD/dJ, Go to PINPOINT TEST C |
| U2005 | Audio Rear Integrated Control Panel Unit is Not Responding | ACM | Not applicable. Vehicle is not equipped with rear integrated control panel (RICP). CLEAR and DOCUMENT DTCs. CARRY OUT ACM self-test. |
| U2008 | Audio Phone is Not Responding | ACM | Not applicable. Vehicle is not equipped with audio phone. CLEAR and DOCUMENT DTCs. CARRY OUT ACM self-test. |
| U2024 | Audio Redundant Steering Wheel Control is Not Responding | AVM | Go To Tinpoint Test H. |
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.