Inspection Procedure

1. for 9 Speaker System:

   Disconnect the R5 and R6 receiver connectors.

2. for 6 Speaker System:

   Disconnect the R5 receiver connector.

3. Measure the resistance of the receiver.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   R5-9 (TX1+) - R5-10 (TX1-)*1	60 to 80 Ω
   R5-9 (TX+) - R5-10 (TX-)*2	60 to 80 Ω
   R6-5 (TX+) - R6-15 (TX-)*2	60 to 80 Ω
   HINT: *1: for 6 speaker system *2: for 9 speaker system

NG: REPLACE RADIO RECEIVER 

Fig 1: Identifying R5 And R6 Receiver Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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: Audio And Visual System AVC-LAN - Circuit Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

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