AUDIO AND VISUAL SYSTEM > AVC-LAN Circuit between Radio Receiver and Gateway ECU

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DESCRIPTION

The radio receiver assembly uses the AVC-LAN to control communication between all of its components. Each component is connected to the AVC-LAN and communicates by sending and receiving switch signals. When the AVC-LAN has a +B short or a GND short, communication is cut and the radio receiver assembly will not function normally.
In the AVC-LAN, the radio receiver assembly becomes the communication master, and the radio receiver assembly has enough resistance necessary for transmitting the communication.

WIRING DIAGRAM


I100184E05


INSPECTION PROCEDURE

1.CHECK RADIO RECEIVER ASSEMBLY


    E108289E06

  1. Measure the resistance of the receiver.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L56-9 (TX+) - L56-10 (TX-)
    		Always
    		60 to 80 Ω



NG
REPLACE RADIO RECEIVER ASSEMBLY
OK


2.CHECK WIRE HARNESS (RADIO RECEIVER ASSEMBLY - GATEWAY ECU)


    E109067E02

  1. Disconnect the L56 radio receiver assembly and K66 gateway ECU connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    L56-9 (TX+) - K66-6 (GTX+)
    		Always
    		Below 1 Ω
    L56-10 (TX-) - K66-21 (GTX-)
    		Always
    		Below 1 Ω
    L56-9 (TX+) - Body ground
    		Always
    		10 kΩ or higher
    L56-10 (TX-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

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