NAVIGATION SYSTEM(for Navigation Receiver Type) AVC-LAN Circuit

DESCRIPTION

Each navigation system component connected to the AVC-LAN (communication bus) transfers switch signals using the audio visual communication local area network.

If a short to +B or short to ground occurs in the AVC-LAN, the audio system will not function normally because communication is not possible.

WIRING DIAGRAM

B001II7E01

CAUTION / NOTICE / HINT

Tech Tips


  • The navigation receiver assembly is the master unit.

  • When replacing the navigation receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).

PROCEDURE


  1. INSPECT NAVIGATION RECEIVER ASSEMBLY


    1. Remove the navigation receiver assembly Click here.

      B001CU9E05
      Text in Illustration
      *A w/ Rear Seat Entertainment System *B w/ Multi-terrain Monitor
      *a

      Component without harness connected

      (Navigation Receiver Assembly)

      		 - -

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      7 (TX1+) - 8 (TX1-) Always 60 to 80 Ω
      9 (TX+) - 10 (TX-)*1 Always 60 to 80 Ω
      7 (TX3+) - 8 (TX3-)*2 Always 60 to 80 Ω

      • *1: w/ Rear Seat Entertainment System

      • *2: w/ Side Monitor System


    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)


    • *1: w/ Rear Seat Entertainment System

    • *2: w/ Side Monitor System


    1. Disconnect the H55, H56 and H57 navigation receiver assembly connectors.

    2. Disconnect the H63 stereo component amplifier assembly connector.

    3. Disconnect the W14 television display assembly connector*1.

    4. Disconnect the I6 parking assist ECU connector*2.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H55-7 (TX3+) - I6-11 (TX+)*2 Always Below 1 Ω
      H55-8 (TX3-) - I6-10 (TX-)*2 Always Below 1 Ω
      H56-7 (TX1+) - H63-8 (TX+) Always Below 1 Ω
      H56-8 (TX1-) - H63-7 (TX-) Always Below 1 Ω
      H57-9 (TX+) - W14-3 (TX1+)*1 Always Below 1 Ω
      H57-10 (TX-) - W14-4 (TX1-)*1 Always Below 1 Ω
      H55-7 (TX3+) - Body ground*2 Always 10 kΩ or higher
      H55-8 (TX3-) - Body ground*2 Always 10 kΩ or higher
      H56-7 (TX1+) - Body ground Always 10 kΩ or higher
      H56-8 (TX1-) - Body ground Always 10 kΩ or higher
      H57-9 (TX+) - Body ground*1 Always 10 kΩ or higher
      H57-10 (TX-) - Body ground*1 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MALFUNCTIONING PARTS


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

      Tech Tips


      • Check all slave units.

      • When disconnecting a slave unit causes the master unit to return to normal operation, this indicates that the slave unit is malfunctioning. Replace the malfunctioning slave unit.

      OK
      Master unit returns to normal operation.

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE NAVIGATION RECEIVER ASSEMBLY Click here