Engine Cooling Fan Control Circuit

On applications that have variable fan speeds.

Engine cooling fan control circuit.

Or a failure of the fan relay or control circuit is bad news. The fan may work but it only runs at low speed. Cooling fan relay 1 control circuit. Learn how to quickly verify the circuit and control system with this case study on a 2009 lincoln.

This code is a generic trouble code which means it applies to all vehicles equipped with obd ii scanner or vehicles made since 1996 up to present. Which may not be fast enough to prevent overheating. What the p0480 code means. P0481 is the obd ii generic code for a problem with the control circuit for cooling fan 2.

P0480 means that the cooling fan 1 control circuit has a malfunction. How to test ford and lincoln 3 wire electric cooling fans. The engine may also overheat if fan speed fails to increase when additional cooling is needed. The a c clutch requested.

The a c clutch requested. Error code p0480 is defined as cooling fan 1 control circuit malfunction. Https amzn to 2lci9ag in this video we will demonstrate how to test radiator fan and radiator fan con. The engine coolant temperature reaches 106 c 223 f or more.

The ecm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. The ecu then triggers a check engine light to illuminate on the dashboard. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. This code refers to the engine cooling fan circuit as it experiences a malfunction causing the fan to fail and allowing the engine to overheat.

Engine cooling fan issues. When the temperature reaches about 223 degrees f value depends on make model engine the pcm will command the cooling fan relay to turn on the fan. The engine coolant temperature reaches 106 c 223 f or more. The cooling fan relay will be commanded on when the following conditions are met.

If this does not take place the check engine light will illuminate on the dashboard. The pcm powertrain control module senses the increase in engine temperature through the cts coolant temperature sensor located near the thermostat. The pcm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. The cooling fan should be commanded on under certain conditions where the engine requires more cooling and this is controlled via the cooling fan relay.