Page 37 of the 2006 owners manual said (quoted/copy/pasted)
Passenger Front Airbag On/Off Switch
The on/off switch is located at the right end of the
instrument panel and is accessible by opening the passenger
door.
The on/off switch is to be used only when the passenger
is:
•
an infant (less than 1 year old),
•
a child, age 1 to 12,
•
an adult with a medical condition which makes passenger
airbag inflation (deployment) a greater risk for
the passenger than the risk of hitting the dashboard
(instrument panel) or windshield in a crash.
If the airbag is turned off when there is any other
occupant at that position, the supplemental restraint
provided by the airbag will not be available.
(next page
To Shut Off the Passenger Airbag:
•
Place the ignition key in the on/off switch, turn the
key clockwise, and remove the key from the switch.
This will shut off the passenger front airbag.
•
The air bag will remain off until the switch is turned
back to the ON position.
• The switch does NOT turn off the side airbag.
Hope this helps! If not, maybe someone removed the switch? If so, then I would think that airbag light in the center console would have been lit.