AVC-LAN Circuit: Procedure

1. Disconnect the radio receiver assembly connectors.
   Fig 1: Radio Receiver Assembly Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J95-5 (ATX+) - J95-15 (ATX-)	Always	60 to 80 Ω
   J98-9 (TXM+) - J98-10 (TXM-)	Always	60 to 80 Ω
   J96-9 (TX+) - J96-10 (TX-)	Always	60 to 80 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Radio Receiver Assembly)
   *2	Component without harness connected (Radio Receiver Assembly)
   *3	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: AVC-LAN Circuit Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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