Theory Of Operation

The radio performs the active noise cancellation (ANC) of sound waves from the vehicle's speakers to cancel engine related noises from the passenger compartment. The created sound waves are made in proportion to engine RPM and inputs from the interior microphones. The radio receives engine RPM signals from a direct hardwired engine RPM signal circuit from the Powertrain Control Module (PCM). The radio uses 4 microphones located in the headliner for ANC inputs to listen for engine noises in the interior compartment. The radio monitors the CAN bus, speaker, crankshaft pulse, and microphone inputs for concerns.

For additional information regarding the description and operation of the Audio System. Refer to AUDIO/VIDEO/ENTERTAINMENT/CONNECTIVITY, DESCRIPTION AND OPERATION .