Automatic Sound Levelizer Function Is Abnormal Operation

AUTOMATIC SOUND LEVELIZER FUNCTION IS ABNORMAL OPERATION

CIRCUIT DESCRIPTION

The stereo component amplifier's Auto Sound Levelizer (ASL) adjusts the audio volume in accordance with vehicle noise. For example, when vehicle noise increases, the ASL automatically increases the audio's volume.
In a standard system, the ASL uses speed signals from the combination meter and a microphone to determine audio volume.
In a Mark Levinson system, the ASL uses speed signals from the combination meter to determine audio volume.

Wiring Diagram:

Step 1:

Step 2:

INSPECTION PROCEDURE