Inspection Procedure

1. Disconnect the radio receiver connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance 

   RESISTANCE SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   E40-5 (ATX+) - E40-15 (ATX-)	Always	60 to 80 Ω

   Fig 1: Identifying E40 Radio Receiver Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG: REPLACE RADIO RECEIVER  (See REMOVAL  )

   OK: Go to Next Step 

HINT:

For details of the connectors, 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.
      Fig 2: AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      There is no open or short circuit  .

      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: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE  (See PROBLEM SYMPTOMS TABLE  )

     OK: REPLACE MALFUNCTIONING PARTS