Mute Signal Circuit Between Navigation Receiver Assembly and Stereo Component Amplifier (from 12/2010)

NAVIGATION: NAVIGATION SYSTEM: Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier
- Mute Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier

DESCRIPTION

This circuit sends a signal to the stereo component amplifier assembly to mute noise. Because of that, the noise produced by changing the sound source ceases.

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 stereo component amplifier assembly is functioning normally, no sound or only an extremely faint sound can be heard.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY

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





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - STEREO COMPONENT AMPLIFIER)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table (from 12/2010)

2. CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER - STEREO COMPONENT AMPLIFIER)

(a) Disconnect the E52 navigation receiver assembly connector.

(b) Disconnect the E20 stereo component amplifier assembly connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT STEREO COMPONENT AMPLIFIER ASSEMBLY (OUTPUT SIGNAL)

(a) Reconnect the E20 stereo component amplifier assembly connector.





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

Standard Voltage:





Text in Illustration





NG -- REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Removal (from 12/2010)

OK -- REPLACE NAVIGATION RECEIVER ASSEMBLY Removal (from 12/2010)