AVC-LAN Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: AVC-LAN Circuit
- AVC-LAN Circuit

DESCRIPTION

Each audio system component 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 audio system will not function normally because communication is not possible.

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER ASSEMBLY

(a) Disconnect the radio receiver assembly connectors.





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

Standard Resistance:

w/ Back Door Speaker





w/o Back Door Speaker





Text in Illustration





NG -- REPLACE RADIO RECEIVER ASSEMBLY Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR

HINT
For details of the connectors, refer to Terminals of ECU Pinout Values and Diagnostic Parameters.

(a) Referring to the following AVC-LAN wiring diagram, 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.
* When disconnecting a slave unit causes the master unit to return to normal operation, this indicates that the slave unit is malfunctioning. Replace the malfunctioning slave unit.

OK:

Master unit returns to normal operation.

NG -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

OK -- REPLACE MALFUNCTIONING PARTS