Toyota Venza: Audio Receiver Assembly Communication Stop Mode

Toyota Venza Service Manual / Networking / Can Communication System / Audio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Audio Receiver Assembly Communication Stop Mode	"Display and Navigation (AVN1)" is not displayed on the "CAN Bus Check" screen of the Techstream Applies to Audio Receiver Assembly Communication Stop Mode in DTC Combination Table.	Power source circuit of radio and display receiver assembly Radio and display receiver assembly branch wire or connector Radio and display receiver assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Turn the ignition switch off before measuring the resistances between CAN bus main wires and between CAN bus branch wires.
Turn the ignition switch off before inspecting CAN bus wires for a ground short.
After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not operating.
Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

HINT:

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

1.	CHECK FOR OPEN IN CAN BUS WIRES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)

(a) Turn the ignition switch off.

(b) Disconnect the radio and display receiver assembly connector.

Text in Illustration

*1	Front view of wire harness connector (to Radio and Display Receiver Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
E42-9 (CANH) - E42-10 (CANL)	Ignition switch off	54 to 69 Ω

REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH WIRE)

2.	CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Disconnect the radio and display receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Condition	Specified Condition
E4-4 (+B1) - Body ground	Always	11 to 14 V
E4-3 (ACC1) - Body ground	Ignition switch ACC	11 to 14 V
E42-1 (IG) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*1	Front view of wire harness connector (to Radio and Display Receiver Assembly)

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE TERMINAL)

3.	CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E4-7 (GND1) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Radio and Display Receiver Assembly)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND TERMINAL)

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