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The fan control module (FCM) as its is known industrially is can function as a relay or switch regulating the cooling fan operation. In some vehicles the FCM is relay between the engine control module (ECM) which turns on the fans as needed for cooling and when the air conditioning running. In other applications the FCM directly controls the cooling fans of the radiator based on temperature sensor readings. An FCM is critical component to keeping a vehicle from dangerous overheating breakdowns.
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What are the fuses 'under the coolant tank' for in a 1998 GTI VR6?
These fuses and control unit control that big fan motor on your radiator.
2003 mercury grand marquis wiring diagrams radiator fan?
need wiring diagram for radiator fan control
Where is a fan controller on a Plymouth Voyager?
If you are talking about radiator fan relay, then it is in weird location which is under the fan unit.
How do you change the radiator relay fan on a 91 plymonth acclaim?
fan control relay
How does the radiator fan of a 1992 Pontiac sunbird activate and deactivate?
The PCM (powertrain control unit/computer) sends power to the fan relay based on the output of the coolant temperature sensor reading. The relay then sends power to the fan; thus turning the fan on.
What is error code on jeep 2001 p 1491?
P1491 Radiator Fan Control Relay Circuit An open or shorted condition detected in the radiator fan control relay control circuit. This includes PWM solid state relays.
What would cause the radiator fan to always run on a 96 Toyota Corolla?
a bad fan control relay
Why are your fan blowers on all the time on 1996 jetta?
If you mean the radiator fan make sure the airconditioning is off. If the fan keeps running it could be a bad fanswitch (located on radiator tank. Or a failed control relay (if fitted) If still no luck check for a failed AC fan control relay.
What is wrong with your fan it works but doesn't kick on automaticly on ford thunderbird 1995?
Check radiator fan control relay.
What does OBD code P1491 mean?
P1491 - Radiator Fan Control Relay Circuit
How many radiator control fan relays are on a 2001 Jeep Grand Cherokee?
One
Does the coolant temp sensor on a 2002 cherokee control the radiator fan relay?
The engine computer uses the signal from the coolant temperature sensor to decide when to activate the radiator fan relay.
