Check Cooling Fan Operation With Low Temperature Below C F

(a) Turn the ignition switch ON.

(b) Check that the cooling fan stops.

If not, check the cooling fan relay and ECT sensor, and check for a separated connector or severed wire between the cooling fan relay and ECT sensor.

(c) Disconnect the ECT sensor connector.

(d) Check that the cooling fan rotates.

If not, check the engine main relay, cooiing fan relay, cooling fan, fuses, and check for short circuit between the cooling fan reiay and ECT sensor.

(e) Reconnect the ECT sensor connector.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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