Corsica L4-2.2L VIN 4 (1995)
Radiator Cooling Fan Motor: Description and Operation
DESCRIPTION
The electric cooling fan is controlled by the PCM based on inputs provided by the intake air temperature sensor, the A/C refrigerant pressure sensor
and the vehicle speed sensor.
OPERATION
When the engine coolant temperature is above 223°F or the A/C is requested, and the vehicle speed is less than 35 mph. The fan will be turned on if
any diagnostic trouble codes (DTC 14 or 15) are set, A/C pressure is excessive, or engine coolant temperature is in excess of 239°F regardless of
vehicle speed. The fan will remain on and may continue running for up to seven minutes after ignition switch is turned to Off position if engine coolant
temperature is above 212°F and intake air temperature is in excess of 176°F. The cooling fan will also continue to run if engine coolant temperature is
in excess of 233°F and air intake temperature is in excess of 100°F or if coolant temperature is in excess of 240°F. Fan operation is discontinued if
vehicle speed exceeds 70 mph, engine coolant temperature drops below 243°F, or A/C refrigerant pressure is greater than 300 psi.
