Normal Operation

DTC U0100:00 (Lost Communication With ECM/PCM "A": No Sub-Type Information) - sets in the Instrument Panel Cluster (IPC) if data messages received from the PCM over the High Speed Controller Area Network (HS-CAN) are missing for greater than 5 seconds. For a complete list of all network messages, refer to MODULE COMMUNICATIONS NETWORK article.

NOTE: Once the IPC sets DTC U0100:00, multiple gauges or indicators are likely to be inoperative in the IPC. Other modules that require data from the IPC all set communication DTCs and may also exhibit system function concerns.

This pinpoint test is intended to diagnose the following: