Navigation System (For Navigation Receiver Type) Avc-Lan Circuit


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT NAVIGATION RECEIVER ASSEMBLY

CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)

INSPECT MALFUNCTIONING PARTS

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


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type).Navigation System (For Navigation Receiver Type) Avc-Lan Circuit


INSPECTION PROCEDURE

HINT:
  1. The navigation receiver assembly is the master unit.
  2. When replacing the navigation receiver assembly, it is necessary to perform the vehicle contract setting for Connected Services (w/ Connected Services Function).
1.INSPECT NAVIGATION RECEIVER ASSEMBLY


  1. Remove the navigation receiver assembly (LandCruiser RM000003B6H02GX.html).


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Navigation Multi Info Display.Navigation System (For Radio And Display Type).Navigation System (For Navigation Receiver Type) Avc-Lan Circuit


    Text in Illustration
    *A
    		w/ Rear Seat Entertainment System
    		*B
    		w/ Multi-terrain Monitor
    *a
    		Component without harness connected
    (Navigation Receiver Assembly)
    		-
    		-

  1. 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. *1: w/ Rear Seat Entertainment System
    2. *2: w/ Side Monitor System


NG
REPLACE NAVIGATION RECEIVER ASSEMBLY (LandCruiser RM000003B6H02GX.html)
OK


2.CHECK HARNESS AND CONNECTOR (AVC-LAN CIRCUIT)
  1. *1: w/ Rear Seat Entertainment System
  2. *2: w/ Side Monitor System

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

  1. Disconnect the H63 stereo component amplifier assembly connector.

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

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

  1. 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.

    HINT:
    1. Check all slave units.
    2. 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.


NG
REPLACE NAVIGATION RECEIVER ASSEMBLY (LandCruiser RM000003B6H02GX.html)
OK

REPLACE MALFUNCTIONING PARTS