Car Cooling Fan Control Circuit

P0480 means that the cooling fan 1 control circuit has a malfunction.

Car cooling fan control circuit.

On applications that have variable fan speeds. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. On older fan circuits the thermostatic switch connects to battery power on one side and to the fan motor on the other. The fan may work but it only runs at low speed.

The vehicle s pcm s function is to act as a ground to operate components not to supply power. The electric cooling fan uses a direct current dc electric motor with a thermo switch module or computer control to turn it on or off depending on coolant temperature or ac operating condition. Which may not be fast enough to prevent overheating. Engine cooling fan issues.

Because it can allow the engine to overheat. The fan relays are nothing but a remote light switch. The engine may also overheat if fan speed fails to increase when additional cooling is needed. A switched terminal will be hot only when the key is on.

Get the 10 gauge wire and place it through the hole in your fire wall. A constant power supply from the battery is present on a terminal in each of the relays. What causes the p0480 code. During the install christian shot.

The ecu then triggers a check engine light to illuminate on the dashboard. This will be the wire that connects your switch to your fan power wire. This one turns on the fan when the circuit is closed. So now we have a wire that goes through the engine bay to the cabin of your car.

Or a failure of the fan relay or control circuit is bad news.