AVC-LAN Circuit

NAVIGATION: NAVIGATION SYSTEM (for DVD): AVC-LAN Circuit
- AVC-LAN Circuit

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers switch signals by the audio visual communication local area network.

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

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
The navigation receiver assembly is the master unit.

PROCEDURE

1. CHECK DISPLAY AND NAVIGATION MODULE DISPLAY ASSEMBLY

(a) Disconnect the L114 and L116 display and navigation module display connectors.





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

Standard Resistance:





*: w/ Advanced Parking Guidance System

Text in Illustration





NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION MODULE DISPLAY - WHICH HAS STEREO THIS CODE)

HINT
For details of the connectors, refer to Terminals of ECU Navigation System (for DVD).

(a) Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.

(1) Disconnect all connectors in all AVC-LAN circuits.

(2) Check for an open or short in all AVC-LAN circuits.

OK:

There is no open or short circuit.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT MALFUNCTIONING PARTS

(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.

NG -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY Removal

OK -- REPLACE MALFUNCTIONING PARTS