AUDIO AND VISUAL SYSTEM (w/o Navigation System) > AVC-LAN Circuit

for Preparation Click here


DESCRIPTION

Each audio system component connected to the AVC-LAN (communication bus) transfers switch signals using the audio visual communication local area network.
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

1.INSPECT RADIO RECEIVER ASSEMBLY


    E222733E01

  1. Disconnect the radio receiver assembly connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    H51-5 (ATX+) - H51-15 (ATX-)
    		Always
    		60 to 80 Ω
    H53-9 (TXM+) - H53-10 (TXM-)
    		Always
    		60 to 80 Ω

    Text in Illustration 
    *a
    		Component without harness connected
    (Radio Receiver Assembly)



NG
REPLACE RADIO RECEIVER ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR

HINT:
For details of the connectors, refer to Terminals of ECU (Click here).



  1. 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.


      E195563E12



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.INSPECT MALFUNCTIONING PARTS

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

    HINT:
    1. Check all slave units.
    2. 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 (Click here)
OK

REPLACE MALFUNCTIONING PARTS