AVC-LAN Circuit

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HDD): AVC-LAN Circuit
- 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.

INSPECTION PROCEDURE

NOTICE:
* The navigation computer sub-assembly is the master unit.
* After replacing the radio receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary (w/ SDARS System).

PROCEDURE

1. INSPECT NAVIGATION COMPUTER SUB-ASSEMBLY

(a) Disconnect the H60 navigation computer sub-assembly connector.

(b) Disconnect the H61 navigation computer sub-assembly connector.

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

Standard Resistance:

Text in Illustration

NG -- REPLACE NAVIGATION COMPUTER SUB-ASSEMBLY Removal
OK -- Continue to next step.

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

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

(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 COMPUTER SUB-ASSEMBLY Removal

OK -- REPLACE MALFUNCTIONING PARTS