U0001 CAN Communication Bus Off: DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Check voltage range	Open or Short in CAN communication harness Faulty TCM
Enable Conditions	IG switch on No actuator test No FAIL SAFE status of 3rd gear holding No FAIL in PG-A.B Power voltage ≥ 10V is detected for a series of 0.5 sec Engine STOP,
Threshold Value	In case of no ECU information.
Diagnostic Time	1.5sec
Fail Safe	INTELLIGENT SHIFT and is inhibited Learning for oil pressure control is inhibited Torque Retard requirement is inhibited Direct connection control of TCC is inhibited