Toyota Venza: Control Module Communication Bus OFF (U0073/86,U0100/85,U0129/83)

Toyota Venza Service Manual / Mf1a Transfer / 4wd / Awd / Active Torque Control 4wd System / Control Module Communication Bus OFF (U0073/86,U0100/85,U0129/83)

DESCRIPTION

The AWD 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 No.	DTC Detection Condition	Trouble Area
U0073/86	When the following continues for 5 seconds or more: - Signals from the AWD 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.	CAN communication system
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.	CAN communication system
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.	CAN communication system

PROCEDURE

1.	CHECK FOR DTC

(a) Check for DTCs (See page ).

(b) Record the output DTCs (active torque control 4WD system).

HINT:

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

GO TO CAN COMMUNICATION SYSTEM

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