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.
2011 Ford Flex SEFACTORY OEM SERVICE PROCEDURE
Audio Control Module (ACM) - Without Navigation
AUDIO CONTROL MODULE (ACM) - WITHOUT NAVIGATION DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B1031 | SDARS Satellite Antenna Open | GO to PINPOINT TEST S . |
| B1032 | SDARS Satellite Antenna Short | GO to PINPOINT TEST S . |
| B1117 | Audio Steering Wheel Button Stuck | GO to PINPOINT TEST M . |
| B1318 | Battery Voltage Low | GO to PINPOINT TEST AF . |
| B1342 | ECU is Faulted |
NOTE:
DTC B1342 may set as a result of a speaker circuit fault. In this case, DTC B2965 should also be set. Be sure to repair the speaker circuit fault before diagnosing DTC B1342. CLEAR the DTCs. REPEAT the self-test. If DTC B1342 is the only DTC retrieved again, INSTALL a new Audio Control Module (ACM). REFER to AUDIO CONTROL MODULE (ACM)
in this service information. TEST the system for normal operation. |
| B2103 | Antenna Not Connected | GO to PINPOINT TEST A . |
| B2404 | Audio Steering Wheel Switch Circuit Failure | GO to PINPOINT TEST M . |
| B2406 | Audio Disc CD Player Internal Fault |
NOTE:
DTC B1342 may also be set. CLEAR the DTCs. REPEAT the self-test. If DTC B2406 is retrieved again, INSTALL a new ACM
. REFER to AUDIO CONTROL MODULE (ACM)
in this service information. TEST the system for normal operation. |
| B2477 | Module Configuration Failure | REFER to MODULE COMMUNICATIONS NETWORK - MODULE CONFIGURATION article. |
| B2965 | Audio System Speaker Circuit Fault | For vehicles without Sony® sound, GO to PINPOINT TEST B
. For vehicles with Sony® sound, GO to PINPOINT TEST C . |
| U0140 | Lost Communication With Body Control Module (GEM ) | GO to PINPOINT TEST AE . |
| U0155 | Lost Communication With Instrument Panel Cluster (IC ) Module | GO to PINPOINT TEST AS . |
| U0196 | Lost Communication With Entertainment Control Module - Rear (AUX) | GO to PINPOINT TEST AU . |
| U0197 | Lost Communication With Telephone Control Module | GO to PINPOINT TEST AQ . |
| U0238 | Lost Communication With Digital Audio Control Module "D" (DSP ) | GO to PINPOINT TEST AR . |
| U0255 | Lost Communication With Front Controls Interface Module | GO to PINPOINT TEST AX . |
| U0256 | Lost Communication With Front Display Interface Module | GO to PINPOINT TEST AY . |
| U2050 | No Application Present | REFER to MODULE COMMUNICATIONS NETWORK - MODULE CONFIGURATION article. |
| U2051 | One or More Calibration Files Missing / Corrupt | REFER to MODULE COMMUNICATIONS NETWORK - MODULE CONFIGURATION article. |
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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