DTC U0101 Serial Communication Problem With TCU (Timeout): DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible cause
DTC Strategy	Detects failures in communication between ECM and TCM	CAN BUS TCM ECM
Enable Conditions	Engine Run Time ≥ 2sec. Ignition Voltage ≥ 11V
Threshold value	When ECM can't get TCU ID for more than 0.5 second
Diagnosis Time	Continuous
MIL On Condition	2 Driving Cycle