Engine Cooling Fan Control Circuit

Learn how to quickly verify the circuit and control system with this case study on a 2009 lincoln.

Engine cooling fan control circuit.

The a c clutch requested. On applications that have variable fan speeds. If this does not take place the check engine light will illuminate on the dashboard. The a c clutch requested.

The ecm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. The pcm powertrain control module senses the increase in engine temperature through the cts coolant temperature sensor located near the thermostat. Because it can allow the engine to overheat. 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.

The cooling fan relay will be commanded on when the following conditions are met. The engine may also overheat if fan speed fails to increase when additional cooling is needed. The fan may work but it only runs at low speed. Error code p0480 is defined as cooling fan 1 control circuit malfunction.

P0481 is the obd ii generic code for a problem with the control circuit for cooling fan 2. Cooling fan relay 1 control circuit. P0480 means that the cooling fan 1 control circuit has a malfunction. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected.

The cooling fan relay will be commanded on when the following conditions are met. The ecu then triggers a check engine light to illuminate on the dashboard. How to test fan module control box ms908p scanner. Which may not be fast enough to prevent overheating.

The engine coolant temperature reaches 106 c 223 f or more. Engine cooling fan issues. 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. What the p0480 code means.

The pcm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. How to test ford and lincoln 3 wire electric cooling fans. Or a failure of the fan relay or control circuit is bad news. The engine coolant temperature reaches 106 c 223 f or more.