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Home >> Audi >> 2013 >> A4 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 792 (Information And Entertainment Systems - 4.2-Inch (107MM) 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 2017 Lincoln Navigator and 2017 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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