AVC-LAN Circuit (To 8/2009): Procedure

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

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2. Disconnect the display and navigation module display connector.
   Fig 2: Identifying Display And Navigation Module Display Connector

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3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G4-13 (TX+) - G4-14 (TX-)	Always	60 to 80 Ω
   G5-1 (TX1+) - G5-2 (TX1-)	Always	60 to 80 Ω
   G5-12 (TX2+) - G5-13 (TX2-)*4	Always	60 to 80 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Display and Navigation Module Display)
   *2	Component without harness connected (Display and Navigation Module Display)
   *3	w/ Headup Display

   • *4: w/ Headup Display

NG → See step   4 

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: Identifying AVC-LAN Wiring Diagram

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      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   3 

OK → REPLACE MALFUNCTIONING PARTS