Catera V6-3.0L VIN R (1997)
Radiator Cooling Fan Motor: Description and Operation
Engine Cooling Fan Operation Parameters
ENERGIZED
100°C (212°F): The primary fan is energized at low speed using a resistor; the secondary fans are energized in a series (half speed).
105°C (221°F): The primary fan is still energized at low speed; the secondary fans are switched to Full speed.
110°C (230°F): The primary and secondary fans are at full speed.
DE-ENERGIZED
105°C (221°F): The primary fan is switched to low speed; the secondary fans are still at full speed.
100°C (212°F): The secondary fans are switched to a series (half speed); the primary fan is still at low speed.
95°C (203°F): All fans are turned off.