[boweld11]

Hello, Gentlemen, I have a problem with the e60 n52b25. After starting the car, the fan immediately hits the max rpm. I connected the computer to check the temperature of the oil and liquid and the fan stops going crazy only when the car is 55/60 degrees. I bled the pump but it didn't help. Ista does not show anything related to cooling apart from the failure of the 9c55 fogging sensor. I thought it was the sensor by the radiator that is responsible for the fan speed, but the replacement did not give anything. Thanks for the help

[Node]

Have you looked at live data what temperature sensors read? Or just went with parts canon?

I could see two other possibilities:

1. Max rpms are ALSO caused by overpressure in air conditioning refrigerant circuit. Don't remember if this one can be seen in live data of IHKA.
2. Fan internal issue (control circuit failure). You could test that by commanding fan to certain speed using diagnosis equipment.

But REALLY you need training/learning how cars work if you are in the business of "fixing" cars and such elementary questions arise.

[boweld11]

I will try to check it and let you know

[Temnij]

This is a problem with coolant pump

[boweld11]

This is a problem with coolant pump

In fact, it seems as if it always starts when the temperature of the fluid is already quite high. The fan stops spinning when warm air starts blowing in the cabin. Just like there was only warm fluid in circulation.

[Node]

Give use readings of live data. What is radiator temp, what is engine block temp, etc. I don't like using this new BMW diag device: https://cartechnology.co.uk/showthread.p...#pid561159

[Beard]

Hello.
There may be several problems in your case
1. as already mentioned here, the increased pressure of the air conditioning system (pressure sensor in the air conditioning system)
2. Coolant pump.
3. Thermostat. (it has a sensor)
4. Engine temperature sensor.
In the latter case, the diagnostics will not read any errors.
In the first three cases, the diagnostics should read the faults.

Learn materiel!!!

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[boweld11]

Out of curiosity I connected Inpe. 2e82 - that is, the water pump to be replaced. thanks (oddly enough ista didn't show this error)

[Beard]

Out of curiosity I connected Inpe.  2e82 - that is, the water pump to be replaced.  thanks (oddly enough ista didn't show this error)

Through ISTA you can check the water pump

using activation, there are several modes.


Start the coolant bleeding process. this can be done in two ways: through ISTA and on your own.
1. Connect the charger to the car.
2. turn on the ignition in the car, terminal 15.
3. turn on the dipped headlights.
4. Set the climate temperature to the maximum, and the oven fan speed to the minimum, Turn off the air conditioner.
5. press the gas pedal to the maximum and hold in this state for 10-15 seconds. then release the gas pedal.
If the pump is working, it will start working.
This is called an engine coolant bleed cycle. It lasts approximately 12 minutes.
During pumping, the pump will operate in different modes, at different speeds. It will stop between speeds. If the entire pumping cycle goes well, 12 min. This means the pump is working.

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