Operation CHARM
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Saturn
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1991
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SL L4-1.9L DOHC VIN 7
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Cooling System
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Engine - Coolant Temperature Sensor/Switch
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Radiator Cooling Fan Temperature Sensor / Switch
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Locations
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Cooling Fan Motor Switch
Cooling Fan Motor Switch
The Powertrain Control Module (PCM) turns on the Cooling Fan, by utilizing the information from the PCM Engine Coolant Temperature (ECT) Sensor.