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.
2014 Ford Expedition Limited, 4WDFACTORY OEM SERVICE PROCEDURE
Accessory Protocol Interface Module (APIM)
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| B1201:1C | Steering Wheel Audio Switch Pack 2: Circuit Voltage Out of Range | GO to Pinpoint Test U . |
| B1201:63 | Steering Wheel Audio Switch Pack 2: Circuit/Component Protection Time-Out | GO to Pinpoint Test U . |
| B1252:04 | USB Port: System Internal Failure | GO to Pinpoint Test S . |
| B1252:11 | USB Port: Short to Ground | GO to Pinpoint Test S . |
| B1D79:01 | Microphone Input: General Electrical Failure | GO to Pinpoint Test AA . |
| U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | GO to Pinpoint Test AO . |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | GO to Pinpoint Test AR . |
| U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | GO to Pinpoint Test AD . |
| U0155:00 | Lost Communication With Instrument Panel Cluster (IPC): No Sub Type Information | GO to Pinpoint Test AS . |
| U016A:00 | Lost Communication With Global Positioning System Module: No Sub Type Information | GO to Pinpoint Test AE . |
| U0184:00 | Lost Communication With Radio: No Sub Type Information | GO to Pinpoint Test AT . |
| U0249:00 | Lost Communication With Entertainment Control Module - Rear "B": No Sub Type Information | GO to Pinpoint Test AN . |
| 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 Smart Junction Box (SJB). |
| 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 Cluster (IC). |
| 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 Front Control Module (ACM). |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | REFER to MODULE CONFIGURATION . |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | REFER to MODULE CONFIGURATION . |
| U3000:04 | Control Module: System Internal Failure | GO to Pinpoint Test Q . |
| U3000:41 | Control Module: General Checksum Failure | CLEAR the DTCs. REPEAT the self-test. If DTC U3000:41 is retrieved again, refer to APIM HARDWARE TESTING . |
| U3000:42 | Control Module: General Memory Failure | CLEAR the DTCs. REPEAT the self-test. If DTC U3000:42 is retrieved again, refer to APIM HARDWARE TESTING . |
| U3000:88 | Control Module: Bus Off | REFER to MODULE COMMUNICATIONS NETWORK . |
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to Pinpoint Test AQ . |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to Pinpoint Test AP . |
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.