DTC U0073/94 Control Module Communication Bus OFF; DTC U0100/65 Lost Communication with ECM / PCM: Description

The translate ECU inputs the signals from the ECM via the CAN communication system.

DTC TROUBLE DETECTION CONDITION

DTC No.	DTC Detection Condition	Trouble Area
U0073/94	When using translate ECU to determine malfunction: Both of following conditions are met: After translate ECU completes output signal, signal is not sent for 5 seconds or more Bus off condition occurs one time or more within 100 msec., and this occurs 10 times in a row When using VSC ECU to determine malfunction: When IG1 voltage is 0.5 V or more and vehicle speed is 15 km/h (9 mph) or more, signals from malfunctioning translate ECU (as described above) are received continuously for 2 seconds or more	Communication line between engine control ECU and Translate ECU (CAN communication line)
U0100/65	When using translate ECU to determine malfunction: Both of following conditions are met: Condition that signals cannot be sent to engine control ECU occurs continuously for 2 seconds or more Condition that signals cannot be received from engine control ECU occurs continuously for 2 seconds or more When using VSC ECU to determine malfunction: When IG1 voltage is 0.5 V or more and vehicle speed is 15 km/h (9 mph) or more, signals from malfunctioning translate ECU (as described above) are received continuously for 2 seconds or more	Communication line between engine control ECU and Translate ECU (CAN communication line)
HINT: *: For CAN communication malfunctions, after the malfunction is determined using the translate ECU, the results are sent to the VSC ECU. In total, this takes 7 seconds.