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

DESCRIPTION

Each unit of the navigation system connected to the AVC-LAN (communication bus) transmits switch signals via AVC-LAN communication.

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

WIRING DIAGRAM

A005DMIE02

CAUTION / NOTICE / HINT

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 Click here.

    2. A005CNAE02
      Text in Illustration
      *A for 8 Speakers
      *B w/ Intelligent Parking Assist 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
      L35-7 (TX1+) - L35-8 (TX1-)*1 Always 60 to 80 Ω
      L169-7 (TX3+) - L169-8 (TX3-)*2 Always 60 to 80 Ω

      • *1: for 8 Speakers

      • *2: w/ Intelligent Parking Assist System


    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

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


    1. Disconnect the L35*1 or L169*2 radio and display receiver assembly connector.

    2. Disconnect the L31 stereo component amplifier assembly connector.*1

    3. Disconnect the L64 parking assist ECU connector.*2

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L35-7 (TX1+) - L31-8 (TX+)*1 Always Below 1 Ω
      L35-8 (TX1-) - L31-7 (TX-)*1 Always Below 1 Ω
      L169-7 (TX3+) - L64-11 (TX+)*2 Always Below 1 Ω
      L169-8 (TX3-) - L64-10 (TX-)*2 Always Below 1 Ω
      L35-7 (TX1+) - Body ground*1 Always 10 kΩ or higher
      L35-8 (TX1-) - Body ground*1 Always 10 kΩ or higher
      L169-7 (TX3+) - Body ground*2 Always 10 kΩ or higher
      L169-8 (TX3-) - Body ground*2 Always 10 kΩ or higher

      • *1: for 8 Speakers

      • *2: w/ Intelligent Parking Assist System


    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.

      Tech Tips


      • Check all slave units.

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

      OK
      Master unit returns to normal.

    OK

    REPLACE MALFUNCTIONING PARTS

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here