AUDIO AND VISUAL SYSTEM > AVC-LAN Circuit

for Preparation Click here


DESCRIPTION

Each unit of the audio system connected to the AVC-LAN (communication bus) transfers the signal of each switch by communication.
When a short to +B or short to ground occurs in this AVC-LAN, the audio system will not function normally as the communication is discontinued.

WIRING DIAGRAM


E176046E01


INSPECTION PROCEDURE

1.INSPECT RADIO RECEIVER ASSEMBLY (TX+, TX-)


    E170703E01

  1. Disconnect the D63 radio receiver assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D63-9 (TX+) - D63-10 (TX-)
    		Always
    		60 to 80 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Radio Receiver Assembly)

  1. Reconnect the radio receiver assembly connector.



NG
REPLACE RADIO RECEIVER ASSEMBLY (Click here)
OK


2.INSPECT COMBINATION METER ASSEMBLY (TX+, TX-)


    E170704E01

  1. Disconnect the D1 combination meter assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D1-19 (TX+) - D1-18 (TX-)
    		Always
    		60 to 80 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Combination Meter Assembly)

  1. Reconnect the combination meter assembly connectors.



NG
REPLACE COMBINATION METER ASSEMBLY (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - COMBINATION METER ASSEMBLY)


    E170705E01

  1. Disconnect the D63 radio receiver assembly connector.

  1. Disconnect the D1 combination meter assembly connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D63-9 (TX+) - D1-19 (TX+)
    		Always
    		Below 1 Ω
    D63-10 (TX-) - D1-18 (TX-)
    D1-19 (TX+) - D1-2 (B)
    		Always
    		10 kΩ or higher
    D1-18 (TX-) - D1-24 (ET)

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Radio Receiver Assembly)
    *2
    		Front view of wire harness connector
    (to Combination Meter Assembly)

  1. Reconnect the radio receiver assembly connector.

  1. Reconnect the combination meter assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)