Toyota Venza manuals

Toyota Venza: 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)


NG

REPLACE NAVIGATION RECEIVER ASSEMBLY


OK

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.

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

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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.


OK

REPLACE MALFUNCTIONING PARTS


NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

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