Toyota Tundra Service Manual: AVC-LAN Circuit

DESCRIPTION

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

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

(a) for Column Shift Type:

(1) Remove the navigation receiver assembly with the connector(s) still connected (See page ).

(b) for Floor Shift Type:

(1) Remove the navigation receiver assembly with the connector(s) still connected (See page ).

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

Standard Resistance:

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY

A

(a) Disconnect the J135 navigation receiver assembly connector.

(b) Disconnect the J141 stereo component amplifier assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

HINT:

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

OK:

Master unit returns to normal operation.

A

REPLACE MALFUNCTIONING PARTS

B

REPLACE NAVIGATION RECEIVER ASSEMBLY

C

REPLACE NAVIGATION RECEIVER ASSEMBLY