Pinpoint Test P : DTC (Diagnostic Trouble Code) U0253:00: Notes
WARNING: This page is about a different car, the 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Module Communications Network for schematic and connector information.
Normal Operation and Fault Conditions
The IPMA communicates with the APIM on the HS-CAN1 through the GWM.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0253:00 | Lost Communication With Accessory Protocol Interface Module: No Sub Type Information | A continuous memory DTC that sets in the IPMA if messages received from the APIM over the HS-CAN1 through the GWM are missing for 0.5 seconds or more. |
Possible Causes
- Communication network concern
- APIM
- IPMA concern
- GWM concern