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

Low Power Supply Voltage (C1241/94)

DESCRIPTION If a malfunction in the power source circuit occurs, or a malfunction in communication with the skid control ECU or in a speed sensor occurs, the AWD control ECU will prohibit operati ...

Malfunction in Deceleration Sensor (C1245/93)

DESCRIPTION If a malfunction in the deceleration sensor circuit occurs, the AWD control ECU will output this DTC. DTC No. DTC Detecting Condition Trouble Area ...

Other materials about Toyota Venza:

System Description
SYSTEM DESCRIPTION 1. WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system functions to lock and unlock all the doors from a distance. The system is controlled by a door control transmitter which sends radio waves to the door control r ...

Installation
INSTALLATION PROCEDURE 1. INSTALL REAR DOOR LOCK ASSEMBLY NOTICE: When reusing the removed rear door lock assembly, replace the door lock wiring harness seal on the connector with a new one. Do not allow grease or dust to adhere to the door ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of ...