AVC-LAN Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM: AVC-LAN Circuit

AVC-LAN Circuit

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.

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT RADIO RECEIVER




(a) for 9 Speaker System:
Disconnect the R5 and R6 receiver connectors.
(b) for 6 Speaker System:
Disconnect the R5 receiver connector.
(c) Measure the resistance of the receiver.
Standard resistance:





HINT:
- *1: for 6 speaker system
- *2: for 9 speaker system

NG -- REPLACE RADIO RECEIVER
OK -- Continue to next step.

2. CHECK WIRE HARNESS
HINT: For details of the connectors, refer to the "TERMINALS OF ECU" Pinout Values and Diagnostic Parameters.
(a) Referring to the AVC-LAN wiring diagram below, check all AVC-LAN circuits.
(1) Disconnect all connectors in all AVC-LAN circuits.
(2) Check for an open or short in all AVC-LAN circuits.
OK:
There is no open or short circuit.





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE