AVC-LAN Circuit: Procedure

1. Disconnect the display and navigation module display connector.
   Fig 1: Display And Navigation Module Display Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the display and navigation module display connector.
   Fig 2: Display And Navigation Module Display Connector

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J104-9 (TXM+) - J104-10 (TXM-)	Always	60 to 80 Ω
   J102-12 (TX2+) - J102-13 (TX2-)	Always	60 to 80 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Display and Navigation Module Display)
   *b	Component without harness connected (Display and Navigation Module Display)

NG → See step   5 

OK: Go to next step 

HINT: 

For details of the connectors, refer to Terminals of ECU. 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.
      Fig 3: AVC-LAN Communication Line Wiring Diagram

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      There is no open or short circuit.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect and reconnect each slave unit one by one until the master unit returns to normal operation.

   HINT: 

   • Check all slave units.
   • If disconnecting a slave unit causes the master unit to return to normal operation, the slave unit is defective and should be replaced.

   OK

   Master unit returns to normal operation.

NG → See step   4 

OK → REPLACE MALFUNCTIONING PARTS