What controls an electric engine cooling fan?
The PCM controls fan operation; it uses the signal from the ECT or engine coolant temperature sensor. This sensor senses the temperature of the engine’s coolant and sends a variable voltage signal to the PCM. The PCM operates the fan motor through the engine’s cooling fan relay.
Does the ECM control the engine fan?
Electric fans generally are controlled by a relay, which in turn is controlled by the Engine Control Module (ECM). The inputs the ECM uses to turn the fans on are different for an A/C request and would make this test invalid. … Once the thermostat operation is verified, I move on to the cooling fans’ operation.
What is fan control module?
An A/C fan control module helps to control the blower that supplies air to the cabin of a vehicle, as well as the cooling fans. The module helps to make sure that the cool air that is produced within the A/C system of a car is blown into the cabin.
Why does my engine cooling fan keep running?
It’s normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. However, if the fan is running for an extended period, the fan itself can become damaged due to overuse. … It’s possible you may have a module or relay failing in your car.
Can you drive a car if the radiator fan is not working?
As such, you should never drive your vehicle if the cooling fan isn’t working even though you can. … If the radiator does not have cool air blowing on it constantly, it will overheat eventually, so you’d need the perfect combination of weather and traffic to drive effectively without a radiator fan.
What causes a car fan to stop working?
Six things may prevent an electric cooling fan from coming on: … Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
What controls the cooling fan?
The fans are controlled either with a thermostatic switch or by the engine computer, and they turn on when the temperature of the coolant goes above a set point. They turn back off when the temperature drops below that point. Rear-wheel drive cars with longitudinal engines usually have engine-driven cooling fans.
Where is the fan control module located?
The cooling fan control module in your vehicle is located at the front left of the engine compartment next to the radiator.