Normal Operation

• DTC U0257:00 (Lost Communication With Front Controls/Display Interface Module: No Sub Type Information) - sets in continuous memory in the Instrument Panel Cluster (IPC) if data messages received from the Front Control/Display Interface Module (FCDIM) over the High Speed Controller Area Network (HS-CAN) are missing for 5 seconds or more. For a complete list of all network messages, refer to MODULE COMMUNICATIONS NETWORK .

This pinpoint test is intended to diagnose the following: 

• FCDIM
• IPC