See also:

Checking Engine Cooling Fan
The engine cooling fan should come on automatically if the engine coolant temperature is high. ...

7,500 miles (12,000 km) or 6 months
Inspect air cleaner filter Inspect vacuum hose Replace engine oil and filter (7,500 miles (12,000 km) or 12 months) ...

Air intake control
  This is used to select outside (fresh) air position or recirculated air position. To change the air intake control position, push the control button. Recirculated air position   ...