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 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   J66-5 (ATX+) - J66-15 (ATX-)	Always	60 to 80 Ω
   J65-9 (TXM+) - J65-10 (TXM-)	Always	60 to 80 Ω
   J63-9 (TX+) - J63-10 (TX-)	Always	60 to 80 Ω

NG: REPLACE RADIO RECEIVER  (See REMOVAL  )

OK: Go to next step 

HINT

For details of the connectors, refer to TERMINALS OF ECU (See )

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.

      OK: There are no open or short circuits. 

      Fig 2: AVC-LAN - Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect each slave unit one by one to check if the master unit returns to normal operation If the master unit does not return to normal operation, reconnect the disconnected slave unit and then check the other slave units

   OK: Master unit returns to normal operation. 

   HINT.

   • Check all slave units.
   • If the master unit returns to normal operation after disconnecting a slave unit, there is a short in the slave unit Therefore, replace the slave unit

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

OK: REPLACE MALFUNCTIONING PARTS