Engine Cooling Fan Control Circuit

Because it can allow the engine to overheat.

Engine cooling fan control circuit.

The ecm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. The fan may work but it only runs at low speed. The ecu then triggers a check engine light to illuminate on the dashboard. P0481 is the obd ii generic code for a problem with the control circuit for cooling fan 2.

The a c clutch requested. Cooling fan relay 1 control circuit. The pcm powertrain control module senses the increase in engine temperature through the cts coolant temperature sensor located near the thermostat. Or a failure of the fan relay or control circuit is bad news.

The pcm controls the cooling fan by grounding the cooling fan control circuit which turns on the cooling fan relay. Learn how to quickly verify the circuit and control system with this case study on a 2009 lincoln. Https amzn to 2lci9ag in this video we will demonstrate how to test radiator fan and radiator fan con. The engine may also overheat if fan speed fails to increase when additional cooling is needed.

How to test fan module control box ms908p scanner. On applications that have variable fan speeds. The engine coolant temperature reaches 106 c 223 f or more. 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 cooling fan relay will be commanded on when the following conditions are met. Which may not be fast enough to prevent overheating. The vehicles ecu has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. The engine coolant temperature reaches 106 c 223 f or more.

If this does not take place the check engine light will illuminate on the dashboard. The a c clutch requested. How to test ford and lincoln 3 wire electric cooling fans. The cooling fan relay will be commanded on when the following conditions are met.

P0480 means that the cooling fan 1 control circuit has a malfunction. Error code p0480 is defined as cooling fan 1 control circuit malfunction. What the p0480 code means. Engine cooling fan issues.