Pinpoint Test A : DTC (Diagnostic Trouble Code) U0100:00, DTC (Diagnostic Trouble Code) U0101:00: Notes

DTC U0100:00, DTC U0101:00

Normal Operation and Fault Conditions

The BCM communicates with the PCM over the HS-CAN. On gasoline engine equipped vehicles, the TCM is contained inside the PCM and cannot be serviced separately. REFER to: Communications Network - System Operation and Component Description

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
U0100:00	Lost Communication With ECM/PCM "A": No Sub Type Information	A continuous memory DTC that sets in the BCM if powertrain data messages received from the PCM over the HS-CAN are missing.
U0101:00	Lost Communication with TCM: No Sub Type Information	A continuous memory DTC that sets in the BCM of gasoline engine equipped vehicles if powertrain data messages received from the PCM over the HS-CAN are missing.

Possible Sources