Amp Mute Signal Circuit (From Navigation ECU)

AMP MUTE SIGNAL CIRCUIT (FROM NAVIGATION ECU)

CIRCUIT DESCRIPTION
This circuit sends a mute signal to the stereo component amplifier assy to enable the voice on the phone to be heard clearly when the cellular phone is used.

If there is an open in the circuit, no sound can be produced from the speakers while the cellular phone is being used.

If there is a short in the circuit, even though the stereo component amplifier assy is normal, no sound or only an extremely small sound can be produced.

Wiring Diagram:

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE