Dtc U0073/94 Control Module Communication Bus Off

Brake. Corolla. Zre142 Aze141
Brake Control Dynamic Control Systems. Corolla. Zre142 Aze141

DESCRIPTION

INSPECTION PROCEDURE

DTC U0073/94 Control Module Communication Bus OFF


DESCRIPTION

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 Code
DTC Detection Condition
Trouble Area
U0073/94
Either of the following is detected:
  1. 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.
  2. 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

INSPECTION PROCEDURE

Proceed to CAN communication system (COROLLA_ZRE142 RM000000WI60ACX.html).
HINT:
When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before performing troubleshooting for each corresponding sensor.