Toyota Venza: AVC-LAN Circuit

Toyota Venza Service Manual / Navigation / Multi Info Display / Navigation System / AVC-LAN Circuit

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transmits switch signals via AVC-LAN communication.

If a short to +B or short to ground occurs in the AVC-LAN, the navigation system will not function normally because communication is not possible.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

The navigation receiver assembly is the master unit.

PROCEDURE

1.	INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Remove the navigation receiver assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
7 (TX1+) - 8 (TX1-)	Always	60 to 80 Ω

Text in Illustration

*a	Component without harness connected (Navigation Receiver Assembly)

REPLACE NAVIGATION RECEIVER ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

(a) Disconnect the E40 navigation receiver assembly connector.

(b) Disconnect the E14 stereo component amplifier assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E14-8 (TX+) - E40-7 (TX1+)	Always	Below 1 Ω
E14-7 (TX-) - E40-8 (TX1-)	Always	Below 1 Ω
E14-8 (TX+) - Body ground	Always	10 kΩ or higher
E14-7 (TX-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT MALFUNCTIONING PARTS

(a) Disconnect and reconnect each slave unit one by one until the master unit returns to normal.

HINT:

Check all slave units.
If disconnecting a slave unit causes the master unit to return to normal, the slave unit is defective and should be replaced.

OK:

Master unit returns to normal.

REPLACE MALFUNCTIONING PARTS

REPLACE NAVIGATION RECEIVER ASSEMBLY

Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier

DESCRIPTION This circuit sends a signal to the stereo component amplifier assembly to mute noise. Due to this, the noise produced by changing the sound source ceases. If there is an open in the ci ...

Navigation Voice Circuit

DESCRIPTION This circuit is used when the voice switch of the steering pad switch assembly is pushed. Using this circuit, the navigation receiver assembly sends signals to the stereo component a ...

Other materials about Toyota Venza:

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT DOOR SCUFF PLATE LH 2. REMOVE COWL SIDE TRIM SUB-ASSEMBLY LH 3. REMOVE LOWER NO. 1 INSTRUMENT PANEL FINISH PANEL 4. REMOVE LOWER STEERING COLUMN COVER (a) Turn the steering wheel assembly to the right ...

Diagnosis System
DIAGNOSIS SYSTEM 1. DESCRIPTION (a) Diagnostic System When troubleshooting a vehicle with a diagnostic system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from ...

Catalyst System Efficiency Below Threshold (Bank 1) (P0420)
MONITOR DESCRIPTION The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter (TWC) to monitor its efficiency. The first sensor, the air fuel ratio sensor, sends pre-catalyst information to the ECM. The second sensor, the heat ...