Bmw Radiator Fan Not Working

Additional problems can include an issue with the temperature switch the fuse or the cooling fan.

Bmw radiator fan not working.

I d suggest you sort out your aux fan if you can not sure how the setup is on the m54. How to test radiator fan on bmw maxicom scanner. Go to my website and bmw forum. If the fan runs at low speed but not on high speed replace the high speed relay.

If playback doesn t begin shortly try restarting your device. Please try again later. The manual has a electric fan only behind the radiator. No aux fan on the m54.

Get professional help with your vehicle contact us at ultimate bimmer service. If the high speed works but the low speed does not go to step 4. The auto has an aux fan in the front and a viscous behind the radiator. If you notice that the fan motor does not work you will need a replacement.

If both the low and high speeds do not run go to step 3. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. The fan should have been on 100 during an overheat situation. 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.

Https amzn to 2dotdpf in this video we will be using maxisys ms908p to test the radiator fan on this bmw. This is possible when the amount of coolant in your system is low. Sometimes it feels as if the radiator fan is not working even though it is. Check power and ground at the fan connector.

Models with one radiator temp switch with three wires connected to the switch most models 87 89 through late 90s. You should make it your daily habit to check the coolant levels in your radiator.