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 Fiesta S, StandardFACTORY OEM SERVICE PROCEDURE
Accessory Protocol Interface Module (APIM)
ACCESSORY PROTOCOL INTERFACE MODULE (APIM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B1201:1C | Steering Wheel Audio Switch Pack 2: Circuit Voltage Out of Range | Go to PINPOINT TEST I . |
| B1201:63 | Steering Wheel Audio Switch Pack 2: Circuit/Component Protection Time-Out | Go to PINPOINT TEST I . |
| B1252:04 | USB Port: System Internal Failure | Go to PINPOINT TEST H . |
| B1252:11 | USB Port: Circuit Short to Ground | Go to PINPOINT TEST H . |
| B1D79:01 | Microphone Input: General Electrical Failure | Go to PINPOINT TEST I . |
| U0100:00 | Lost Communication With ECM /PCM "A": No Sub Type Information | Go to PINPOINT TEST Z . |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | Go to PINPOINT TEST P . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | Go to PINPOINT TEST AA . |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IPC ): No Sub Type Information | Go to PINPOINT TEST U . |
| U016A:00 | Lost Communication With Global Positioning System Module: No Sub Type Information | Go to PINPOINT TEST AB . |
| U0184:00 | Lost Communication With Radio: No Sub Type Information | Go to PINPOINT TEST X . |
| U0255:00 | Lost Communication With Front Display Interface Module: No Sub Type Information | Go to PINPOINT TEST R . |
| U0422:00 | Invalid Data Received From Body Control Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the Accessory Protocol Interface Module (APIM) or Body Control Module (BCM). |
| U0423:00 | Invalid Data Received From Instrument Panel Control Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Instrument Panel Cluster (IPC). |
| U046B:00 | Invalid Data Received From Global Positioning System Module: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Global Positioning System Module (GPSM). |
| U0485:00 | Invalid Data Received From Radio: No Sub Type Information | RETRIEVE and FOLLOW other DTCs present in the APIM or Audio Control Module (ACM). |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | PROGRAM the APIM . Refer to the Programmable Module Installation (PMI) procedure in MODULE CONFIGURATION . TEST the system for normal operation. |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | PROGRAM the APIM . Refer to the PMI procedure in MODULE CONFIGURATION . TEST the system for normal operation. |
| U3000:04 | Control Module: System Internal Failure | INSTALL a new APIM . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) in this information. TEST the system for normal operation. |
| U3000:41 | Control Module: General Checksum Failure | INSTALL a new APIM . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) in this information. TEST the system for normal operation. |
| U3000:42 | Control Module: General Memory Failure | INSTALL a new APIM . Refer to ACCESSORY PROTOCOL INTERFACE MODULE (APIM) in this information. TEST the system for normal operation. |
| U3000:88 | Control Module: Bus Off | Refer to MODULE COMMUNICATIONS NETWORK . |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | Go to PINPOINT TEST AC . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | Go to PINPOINT TEST AD . |
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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