Air Bag Secondary Warning Chime
WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The air bag secondary warning chime warns that the air bag warning indicator light is inoperative and that a Supplemental Restraint System (SRS) fault condition exists. The IPC monitors the air bag warning indicator status internally. When a fault is detected in the air bag warning indicator during prove-out or while the RCM is requesting the air bag warning indicator on through the air bag warning indicator status message, the air bag secondary warning chime sounds five repetitive 1 second chime tones.