Bmw E90 Radiator Fan Not Working

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Bmw e90 radiator fan not working.

Belts and hoses and replacing the factory oem plastic aluminum crimped junk radiator with an all aluminum radiator. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. The fan should come on at high speed. The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure because fan is not coming on.

If it does this might be the issue as well. I ve consulted the bentley manual and it doesn t indicate recoding is necessary if the fan is replaced. If it does the fan motor is ok. Https amzn to 2dotdpf in this video we will be using maxisys ms908p to test the radiator fan on this bmw.

Check power and ground at the fan connector. Discussion in e90 e92 e93 m3 2008 2013 started by 106598 sep 6 2016. Cooling fans do not function. If the fan does not run on high speed check to see if your application is using a 5 pin relay.

If so retry the test jumpering from terminal 30 to 87a. If the fan does not run check for 12 volts at terminal 30 in the relay socket. 2008 e92 m3 s65 radiator fan removal. How to test radiator fan on bmw maxicom scanner.

It is possible that a wire has worn out due to heat and needs replacement. When replacing your electronic cooling fan you will want to work with the engine cold and disconnect the battery negative cable. Make sure that the fan is not obstructed. If not and the fan is getting correct voltage and a signal then the fan motor is probably shot.

If the fan is not working even when the car is heating up there might be a problem with the wiring. When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed. Replace the high speed relay. Disconnecting the negative battery cable will prevent the electric cooling fan from starting while being serviced.

You need to inspect all the wiring leading into and out from the radiator fan.