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: APIM
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1252:04 | USB Port: System Internal Failure | GO to Pinpoint Test R |
| B1252:11 | USB Port: Circuit Short To Ground | GO to Pinpoint Test R |
| B1D79:01 | Microphone Input: General Electrical Failure | GO to Pinpoint Test P |
| B1D79:11 | Microphone Input: Circuit Short To Ground | GO to Pinpoint Test P |
| B1D79:12 | Microphone Input: Circuit Short To Battery | GO to Pinpoint Test P |
| B1D79:13 | Microphone Input: Circuit Open | GO to Pinpoint Test P |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | GO to Pinpoint Test Y |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information | GO to Pinpoint Test Z |
| U0257:00 | Lost Communication With Front Controls / Display Interface Module: No Sub Type Information | GO to Pinpoint Test AC |
| U0423:00 | Invalid Data Received From Instrument Panel Cluster Control Module: No Sub Type Information |
NOTE:
If no Diagnostic Trouble Codes (DTCs) are present in the IPC, DIAGNOSE the observable symptom. DIAGNOSE any Diagnostic Trouble Codes (DTCs) present in the IPC. REFER to: Instrumentation, Message Center and Warning Chimes
. |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | This DTC sets due to an incorrect or incomplete APIM configuration. Using a diagnostic scan tool, CARRY OUT the APIM programming procedure. REFER to: SYNC Module [APIM] Programming . |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | This DTC sets due to an incorrect or incomplete APIM configuration. Using a diagnostic scan tool, CARRY OUT the APIM programming procedure. REFER to: SYNC Module [APIM] Programming . |
| U3000:04 | Control Module: System Internal Failure | CLEAR the Diagnostic Trouble Codes (DTCs). WAIT at least 10 seconds and then REPEAT the self-test. If the DTC is retrieved again, Refer to APIM Guided Routine Testing . |
| U3000:41 | Control Module: General Checksum Failure | CLEAR the Diagnostic Trouble Codes (DTCs). WAIT at least 10 seconds and then REPEAT the self-test. If the DTC is retrieved again, Refer to APIM Guided Routine Testing . |
| U3000:42 | Control Module: General Memory Failure | CLEAR the Diagnostic Trouble Codes (DTCs). WAIT at least 10 seconds and then REPEAT the self-test. If the DTC is retrieved again, Refer to APIM Guided Routine Testing . |
| U3000:88 | Control Module: Bus Off |
NOTE:
The module was unable to communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this DTC. INSPECT for damaged or corroded wiring at the APIM. Refer to Module Communications Network
for schematic and connector information. CLEAR the DTC. WAIT at least 10 seconds and then REPEAT the self-test. If the DTC is retrieved again, Refer to APIM Guided Routine Testing
. |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to Pinpoint Test AD |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to Pinpoint Test AE |
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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