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.
2018 Ford Fiesta STFACTORY OEM SERVICE PROCEDURE
Information System And Entertainment System DTCS: Am/Fm/Cd/Sync/Touchscreen: ACM
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1A01:01 | Speaker #1: General Electrical Failure | For a LHF door speaker concern, GO to Pinpoint Test H For a LHF door tweeter speaker concern, GO to Pinpoint Test I |
| B1A01:11 | Speaker #1: Circuit Short To Ground | For a LHF door speaker concern, GO to Pinpoint Test H For a LHF door tweeter speaker concern, GO to Pinpoint Test I |
| B1A01:12 | Speaker #1: Circuit Short To Battery | For a LHF door speaker concern, GO to Pinpoint Test H For a LHF door tweeter speaker concern, GO to Pinpoint Test I |
| B1A01:13 | Speaker #1: Circuit Open | GO to Pinpoint Test H |
| B1A02:01 | Speaker #2: General Electrical Failure | For a RHF door speaker concern, GO to Pinpoint Test J For a RHF door tweeter speaker concern, GO to Pinpoint Test K |
| B1A02:11 | Speaker #2: Circuit Short To Ground | For a RHF door speaker concern, GO to Pinpoint Test J For a RHF door tweeter speaker concern, GO to Pinpoint Test K |
| B1A02:12 | Speaker #2: Circuit Short To Battery | For a RHF door speaker concern, GO to Pinpoint Test J For a RHF door tweeter speaker concern, GO to Pinpoint Test K |
| B1A02:13 | Speaker #2: Circuit Open | GO to Pinpoint Test J |
| B1A03:01 | Speaker #3: General Electrical Failure | GO to Pinpoint Test L |
| B1A03:11 | Speaker #3: Circuit Short To Ground | GO to Pinpoint Test L |
| B1A03:12 | Speaker #3: Circuit Short To Battery | GO to Pinpoint Test L |
| B1A03:13 | Speaker #3: Circuit Open | GO to Pinpoint Test L |
| B1A04:01 | Speaker #4: General Electrical Failure | GO to Pinpoint Test M |
| B1A04:11 | Speaker #4: Circuit Short To Ground | GO to Pinpoint Test M |
| B1A04:12 | Speaker #4: Circuit Short To Battery | GO to Pinpoint Test M |
| B1A04:13 | Speaker #4: Circuit Open | GO to Pinpoint Test M |
| B1A56:21 | Antenna: Signal Amplitude < Minimum | If DTC B1A56:21 sets after running the bezel diagnostic tests, DISREGARD this DTC. This test is used for end of line or repair bay testing at the vehicle assembly plant. Each plant has its own assigned frequency and signal strength requirements. The running and passing of this test depends on local radio stations. If no local station is broadcasting on the required frequency, the test will fail. |
| B1A89:11 | Satellite Antenna: Circuit Short To Ground | For a satellite radio concern, GO to Pinpoint Test B For a SIRIUS Travel Link concern, GO to Pinpoint Test C For a navigation concern (if equipped), GO to Pinpoint Test Y For a compass concern, GO to Pinpoint Test Z |
| B1A89:13 | Satellite Antenna: Circuit Open | For a satellite radio concern, GO to Pinpoint Test B For a SIRIUS Travel Link concern, GO to Pinpoint Test C For a navigation concern (if equipped), GO to Pinpoint Test Y For a compass concern, GO to Pinpoint Test Z |
| B1D19:49 | Compact Disc Unit: Internal Electronic Failure | GO to Pinpoint Test V |
| B1D19:4B | Compact Disc Unit: Over Temperature | GO to Pinpoint Test V |
| U0155:00 | Lost Communication With IPC Control Module: No Sub Type Information | GO to Pinpoint Test AD |
| U0253:00 | Lost Communication With Accessory Protocol Interface Module: No Sub Type Information | GO to Pinpoint Test AH |
| U0256:00 | Lost Communication With Front Controls Interface Module "A": No Sub Type Information | GO to Pinpoint Test AI |
| U201A:51 | Control Module Main Calibration Data: Not Programmed | This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, PERFORM the ACM programming procedure using as-built data. For information on as-built data, REFER to: Module Configuration - System Operation and Component Description . See As-Built Data. |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, PERFORM the ACM programming procedure using as-built data. For information on as-built data, REFER to: Module Configuration - System Operation and Component Description . See As-Built Data. |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | This DTC sets due to an incorrect or incomplete ACM configuration. Using a diagnostic scan tool, PERFORM the ACM programming procedure using as-built data. For information on as-built data, REFER to: Module Configuration - System Operation and Component Description . See As-Built Data. |
| U3000:41 | Control Module: General Checksum Failure | CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If DTC U3000:41 is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) . |
| U3000:42 | Control Module: General Memory Failure | CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If DTC U3000:42 is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) . |
| U3000:96 | Control Module: Component Internal Failure | CLEAR the DTC. WAIT at least 10 seconds. REPEAT the self-test. If DTC U3000:96 is retrieved again, INSTALL a new ACM. REFER to: Audio Front Control Module (ACM) . |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to Pinpoint Test AJ |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to Pinpoint Test AK |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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