Pinpoint Test X : DTC U0253:00: Notes
WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostic Overview
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Diagnostic Methods in Service Information for information about these practices.
Refer to Supplemental Restraint System , for schematic and connector information.
Normal Operation and Fault Conditions
The RCM uses information contained in messages from the APIM sent on the HS-CAN.
- DTC U0253:00 (Lost Communication With Accessory Protocol Interface Module: No Sub Type Information) - This DTC sets if the RCM does not receive an expected message from the APIM for 6 seconds.
Possible Sources
- Network traffic
- APIM
- RCM