Car Cooling Fan Control Circuit

The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected.

Car cooling fan control circuit.

The vehicle s pcm s function is to act as a ground to operate components not to supply power. Now take the power wire from your fan and connect it to the wire that is going through the firewall. The ecu then triggers a check engine light to illuminate on the dashboard. The fan relays are nothing but a remote light switch.

A switched terminal will be hot only when the key is on. Which may not be fast enough to prevent overheating. This will be the wire that connects your switch to your fan power wire. 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.

Or a failure of the fan relay or control circuit is bad news. The fan may work but it only runs at low speed. On applications that have variable fan speeds. What causes the p0480 code.

P0480 means that the cooling fan 1 control circuit has a malfunction. The fan as well as other apparatus draws too much amperage to be safe in the cockpit so it s kept under the hood. Get the 10 gauge wire and place it through the hole in your fire wall. Because it can allow the engine to overheat.

The engine may also overheat if fan speed fails to increase when additional cooling is needed. On older fan circuits the thermostatic switch connects to battery power on one side and to the fan motor on the other. 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. This one turns on the fan when the circuit is closed.

Engine cooling fan issues.