Mute Signal Circuit Between Stereo Component Tuner Assembly and Multi-media Interface ECU

NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (w/ USB Audio System): Mute Signal Circuit between Stereo Component Tuner Assembly and Multi-media Interface ECU
- Mute Signal Circuit between Stereo Component Tuner Assembly and Multi-media Interface ECU

DESCRIPTION

The navigation receiver assembly controls the volume according to the MUTE signal from the stereo component tuner assembly.

The MUTE signal is sent to reduce noise and a popping sound generated when switching the mode etc. If there is an open in the circuit, noise can be heard from the speakers when changing the sound source. If there is a short in the circuit, even though the navigation receiver assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK STEREO COMPONENT TUNER ASSEMBLY

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





NG -- CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-MEDIA INTERFACE ECU)

OK -- REPLACE STEREO COMPONENT TUNER ASSEMBLY Removal

2. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT TUNER - MULTI-MEDIA INTERFACE ECU)

(a) Disconnect the I38 stereo component tuner assembly connector.





(b) Disconnect the H111 multi-media interface ECU connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal