AVC-LAN Circuit

AUDIO / VISUAL: AUDIO AND VISUAL SYSTEM (for CrewMax): 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) Disconnect the K4 and K22* receiver connectors.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





HINT: *: w/ Rear Seat Entertainment System

Result:





C -- REPLACE RADIO RECEIVER
B -- REPLACE RADIO RECEIVER
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER - COMPONENT WHICH HAS STORED THIS CODE)





HINT: For details of the connectors, refer to the "TERMINALS OF ECU" Audio and Visual System (for CrewMax).
(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 OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE