Bmw E90 Radiator Fan Not Working

Disconnecting the negative battery cable will prevent the electric cooling fan from starting while being serviced.

Bmw e90 radiator fan not working.

If so retry the test jumpering from terminal 30 to 87a. Cooling fans do not function. Make sure that the fan is not obstructed. If the fan is not working even when the car is heating up there might be a problem with the wiring.

Https amzn to 2dotdpf in this video we will be using maxisys ms908p to test the radiator fan on this bmw. When replacing your electronic cooling fan you will want to work with the engine cold and disconnect the battery negative cable. It is possible that a wire has worn out due to heat and needs replacement. The fan should come on at high speed.

If it does the fan motor is ok. If the fan does not run on high speed check to see if your application is using a 5 pin relay. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. Check power and ground at the fan connector.

I ve consulted the bentley manual and it doesn t indicate recoding is necessary if the fan is replaced. Discussion in e90 e92 e93 m3 2008 2013 started by 106598 sep 6 2016. Replace the high speed relay. The s65 is pretty straight forward to work on just take your time.

Non functional cooling fans are another common symptom of a potential problem with the cooling fan relay. If the fan does not run check for 12 volts at terminal 30 in the relay socket. You need to inspect all the wiring leading into and out from the radiator fan. How to test radiator fan on bmw maxicom scanner.

If the relay fails it will be unable to supply power to. If it does this might be the issue as well. 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. 2008 e92 m3 s65 radiator fan removal.

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