Passenger Safety BeltReminder Light
Several seconds after the key is turned to RUN or START, a chime will sound for several seconds to remind the front passenger to buckle their safety belt. This would only occur if the passenger airbag is enabled. The passenger safety belt light will also come on and stay on for several seconds, then it will flash for several more.

This chime and light will be repeated if the passenger remains unbuckled and the vehicle is in motion.
If the passenger’s safety belt is buckled, neither the chime nor the light will come on.
See also:
Why Safety Belts Work
When you ride in or on anything, you go as fast
as it goes.
Take the simplest vehicle. Suppose it is just a
seat on wheels.
Put someone on it.
Get it up to speed. Then stop the vehicle.
...
How the System Works
LDW uses a camera located between the inside
rearview mirror and the windshield to detect the lane
markings.
(Lane Departure Warning): To turn
LDW on and off,
press the LDW control, located ...
Instrument Panel
Instrument Panel
A. Exterior Lamp Controls.
Fog Lamps.
Instrument Panel Illumination Control.
B. Air Vents.
C. Turn and Lane Change Lever.
See Turn and Lane-Change Signals.
Driver Information ...
