Inspection Procedure

1. Disconnect the radio receiver connectors.
   Fig 1: Identifying Radio Receiver Connectors

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION TABLE
   
   

   Tester connection	Condition	Specified condition
   ATX+ - ATX-	Always	60 to 80 Ω
   TX+ - TX-	Always	60 to 80 Ω
   TX+ - TX-	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER 

OK: Go to Next step 

HINT:

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

1. Referring to the AVC-LAN wiring diagram below, 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 AVC-LAN Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE