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DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
U0101 LOST COMM TCM (Lost communication with TCM) When HPCM is not receiving CAN communication signal with TCM for 2 seconds or more in a row. Harness or connectors (CAN communication line is open or shorted.)
When HPCM is not receiving CAN communication signal with TCM for a short period of less than 2 seconds Harness or connectors (Intermittent malfunction in the CAN communication circuit)
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