AVC-LAN Circuit (from 12/2010)

NAVIGATION: NAVIGATION SYSTEM: AVC-LAN Circuit
- AVC-LAN Circuit

DESCRIPTION

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

INSPECTION PROCEDURE

NOTICE:
* The navigation receiver assembly is the master unit.
* After replacing the stereo component tuner assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.

PROCEDURE

1. INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the E52 navigation receiver assembly connector.

(b) Disconnect the E53 navigation receiver assembly connector.

Text in Illustration

NG -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal (from 12/2010)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

HINT
For details of the connectors, refer to Terminals of ECU Terminals of ECU (from 12/2010).

(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 NAVIGATION RECEIVER ASSEMBLY Removal (from 12/2010)

OK -- REPLACE MALFUNCTIONING PARTS