DTC U0073/94 Control Module Communication Bus OFF: Description

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

The skid control ECU receives signals sent from the ECM via the CAN communication system. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

DTC DETECTION CONDITION CHART

DTC Code	DTC Detection Condition	Trouble Area
U0073/94	Either of the following is detected: When the IG1 terminal voltage is between 10 and 17.4 V, after the output of data from the skid control ECU is completed, the sending continues for 5 seconds or more. When the IG1 terminal voltage is between 10 and 17.4 V, the condition that bus OFF state occurs once or more within 0.1 seconds occurs 10 times in succession. (Sent signals cannot be received.)	CAN communication system