AVC-LAN Circuit: Procedure

1. Disconnect the radio receiver assembly connectors.
   Fig 1: Identifying F66 & F82 Radio Receiver Assembly Connectors

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F66-5 (ATX+) - F66-15 (ATX-)	Always	60 to 80 Ω
   F82-9 (TXM+) - F82-10 (TXM-)	Always	60 to 80 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Radio Receiver Assembly)

NG → See step   5 

OK: Go to next step 

HINT: 

For details of the connectors, refer to Terminals of ECU. Refer to TERMINALS OF ECU .

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.

      Fig 2: Identifying Radio Receiver Assembly (Master Unit) & Stereo Component Amplifier Assembly (Slave Unit)

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NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. 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 → See step   4 

OK → REPLACE MALFUNCTIONING PARTS