Car Cooling Fan Control Circuit

The engine may also overheat if fan speed fails to increase when additional cooling is needed.

Car cooling fan control circuit.

Or a failure of the fan relay or control circuit is bad news. This will be the wire that connects your switch to your fan power wire. The vehicle s pcm s function is to act as a ground to operate components not to supply power. So now we have a wire that goes through the engine bay to the cabin of your car.

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. Now take the power wire from your fan and connect it to the wire that is going through the firewall. P0480 means that the cooling fan 1 control circuit has a malfunction. Which may not be fast enough to prevent overheating.

The ecu then triggers a check engine light to illuminate on the dashboard. The temperature controlled switch is designed to turn the fan on when coolant temperatures reach 195 degrees and turn off the fan when temps drop to 185 degrees. This one turns on the fan when the circuit is closed. The fan relays are nothing but a remote light switch.

Engine cooling fan issues. On applications that have variable fan speeds. Because it can allow the engine to overheat. Get the 10 gauge wire and place it through the hole in your fire wall.

The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. During the install christian shot. A switched terminal will be hot only when the key is on. What causes the p0480 code.

The fan may work but it only runs at low speed.