DTC U0073/86: Control Module Communication Bus OFF; DTC U0100/85: Lost Communication with ECM / PCM "A"; DTC U0129/83: Lost Communication with Brake System Control Module: Description

WARNING: This page is about a different variant/trim than selected.

The 4WD control ECU inputs the signals sent from the ECM and skid control ECU 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 No.	DTC Detection Condition	Trouble Area
U0073/86	When the following continues for 5 seconds or more: Signals from the 4WD control ECU are not received. When the following occurs 10 times consecutively: A communication malfunction (bus off) occurs one or more times within 0.1 seconds.	Wire harness (CANL, CANH circuit) 4WD control ECU
U0100/85	When both of the following continue for 2 seconds or more: The voltage of the IG1 terminal is 10 V or more. At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed.	Wire harness (CANL, CANH circuit) 4WD control ECU ECM
U0129/83	When the following continues for 3 seconds or more: The voltage of the IG1 terminal is 10 V or more. Communication with the skid control ECU cannot be performed.	Wire harness (CANL, CANH circuit) 4WD control ECU Skid control ECU