Inspection Procedure

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

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   ATX+ (R7-5) - ATX- (R7-15) ((1))	Always	60 to 80 Ω
   TXM+ (R8-9) - TXM- (R8-10)	Always	60 to 80 Ω
   (1) 10 Speaker System

Fig 1: Identifying Connector Terminal R7 And R8 Of Radio Receiver
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RADIO RECEIVER 

OK: Go to Next Step 

HINT:

For details of the connectors, refer to the "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: 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