Inspection Procedure

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

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

   Tester Connection	Condition	Specified Condition
   ATX+ (E12-5) - ATX- (E12-15) ((1))	Always	60 to 80
   TX+ (E15-9) - TX- (E15-10)	Always	60 to 80
   (1) for 12 Speaker System

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. Check for an open or short in all AVC-LAN circuits.

      OK: 

      There is no open or short circuit. 

      Fig 2: 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