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Home >> Audi >> 2013 >> A4 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 699 (Information And Entertainment Systems - 4.2-Inch (107 Mm) Screen, Am/Fm/Cd/Sync) >> Diagnosis And Testing >> Information and Entertainment System >> Pinpoint Tests >> Pinpoint Test Ad : DTC U0253:00 >> Notes

Pinpoint Test Ad : 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.

Normal Operation and Fault Conditions 

The FCDIM and ACM communicate with the APIM through the I-CAN.

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information Set by the FCDIM and ACM when network messages are missing from the APIM for more than 5 seconds with the ignition in RUN.
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