Automatic air conditioner
1. Air flow control dial
2. Temperature control dial
3. Fan speed control dial
4. Rear window defroster button (See “Rear window and outside mirror defroster
switch” in the “2. Instruments and controls” section.)
5. Outside air circulation 
/Air
recirculation button 
6. A/C (Air Conditioner) button
See also:
Engine compartment check locations
QR25DE engine
1. Power steering fluid reservoir (P. 8-14)
2. Engine oil filler cap (P. 8-10)
3. Brake fluid reservoir/Clutch fluid
reservoir (M/T model) (P. 8-15, 8-15)
4. Air cleaner (P. 8-20) ...
Inside the vehicle
The maintenance items listed here should be
checked on a regular basis, such as when performing
periodic maintenance, cleaning the vehicle,
etc.
Additional information on the following
items ...
New for 2010
The Frontier receives only minor changes for 2010, centered around safety
improvements and greater availability of driveline features. ...