NAVIGATION SYSTEM(for Radio and Display Type) AVC-LAN Circuit

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN communicates via AVC-LAN communication.

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

WIRING DIAGRAM

A0028MPE03

CAUTION / NOTICE / HINT

Note


  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Navigation System.

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Tech Tips

The radio and display receiver assembly is the master unit.

PROCEDURE


  1. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY


    1. Remove the radio and display receiver assembly.

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    2. A0029GYC38
      *A for 12 Speakers
      *a

      Component without harness connected

      (Radio and Display Receiver Assembly)
      A0029SKC10
      *A w/ Panoramic View Monitor System
      *a

      Component without harness connected

      (Radio and Display Receiver Assembly)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F71-7 (TX1+) - F71-8 (TX1-)*1 Always 60 to 80 Ω
      F72-7 (TX3+) - F72-8 (TX3-)*2 Always 60 to 80 Ω

      • *1: for 12 Speakers

      • *2: w/ Panoramic View Monitor System

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the F71 and F72 radio and display receiver assembly connector.

    2. Disconnect the F76 stereo component amplifier assembly connector (for 12 Speakers).

    3. Disconnect the F131 parking assist ECU connector (w/ Panoramic View Monitor System).

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

      Standard Resistance (for 12 Speakers)
      Tester Connection Condition Specified Condition
      F71-7 (TX1+) - F76-8 (TX+) Always Below 1 Ω
      F71-8 (TX1-) - F76-7 (TX-) Always Below 1 Ω
      F71-7 (TX1+) or F76-8 (TX+) - Body ground Always 10 kΩ or higher
      F71-8 (TX1-) or F76-7 (TX-) - Body ground Always 10 kΩ or higher
      Standard Resistance (w/ Panoramic View Monitor System)
      Tester Connection Condition Specified Condition
      F72-7 (TX3+) - F131-10 (TX+) Always Below 1 Ω
      F72-8 (TX3-) - F131-9 (TX-) Always Below 1 Ω
      F72-7 (TX3+) or F131-10 (TX+) - Body ground Always 10 kΩ or higher
      F72-8 (TX3-) or F131-9 (TX-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    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.

      • 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.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here