Toyota Avalon Service & Repair Manual > Audio And Visual System(for Gasoline Model): Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION This circuit is necessary for the Automatic Sound Levelizer (ASL) built into the radio and display receiver assembly. The Automatic Sound Levelizer (ASL) function automatically adjusts the audio system volume in order to compensate for increased vehicle noise (vehicle noise tends to incr ...
