AVC-LAN Circuit between Navigation ECU and Stereo Component Tuner

NAVIGATION: NAVIGATION SYSTEM: AVC-LAN Circuit between Navigation ECU and Stereo Component Tuner

AVC-LAN Circuit between Navigation ECU and Stereo Component Tuner

DESCRIPTION

The navigation system uses the AVC-LAN to control communication between all of its units. Each unit 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 navigation system will not function normally.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (NAVIGATION ECU - STEREO COMPONENT AMPLIFIER ASSEMBLY)




(a) Disconnect the M4 ECU connector.
(b) Disconnect the S23 amplifier connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






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