Diagnosis of an acoustic vehicle alerting system (AVAS) based on existing sensors

A vehicle comprising:

• speakers positioned to play sound to an area external to the vehicle;
• an ultrasonic sensor not part of an acoustic vehicle alerting system;
• and
• the acoustic vehicle alerting system including a processor configured to:
• play a test frequency on the speakers;
• evaluate feedback from the sensor to determine whether there is an error in the acoustic vehicle alerting system;
• and
• when there is the error, display an alert, wherein the sensor is an ultrasonic sensor.

A vehicle comprising:

• speakers positioned to play sound to an area external to the vehicle;
• a sensor not part of an acoustic vehicle alerting system;
• the acoustic vehicle alerting system including a processor configured to:
• play a test frequency on the speakers;
• evaluate feedback from the sensor to determine whether there is an error in the acoustic vehicle alerting system;
• and
• when there is the error, display an alert;
• and
• a grille assembly with a fresh air opening with shutters that, when closed, block the fresh air opening to create a sound wall for sound generated by the speakers to reverberate against.

A vehicle comprising:

• speakers positioned to play sound to an area external to the vehicle;
• sensors not part of an acoustic vehicle alerting system, wherein the sensors include an engine knock sensor and an ultrasonic sensor;
• a dedicated short range communication module to communicate with an external object that has a microphone;
• and
• the acoustic vehicle alerting system including a processor configured to:
• play a test frequency on the speakers;
• receive feedback from the sensors and the external object;
• determine there is an error in the acoustic vehicle alerting system based on a majority of the feedback indicating that there is the error;
• and
• when there is the error, activate a diagnostic light.