See also:

Checking electric cooling fans
WARNING: The cooling fan is controlled by engine coolant temperature and may sometimes operate even when the engine is not running. Use extreme caution when working near the blades of the cooling ...

Maintenance under Severe Usage Conditions
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer to the chart below for the appropriate maintenance intervals. R : Replace I : Ins ...

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   ...