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Old 01-22-2020, 05:03 AM
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Bmw X5 3.0d E53 Pusher fan not starting

Hi all.
I need some advise.
My X5 E53 3.0d's pusher fan does not come one, this results in the air-con not working when the vehicle is standing, while idling obviously, when the vehicle moves the air-con works fine.
I noticed the pusher fan does not turn on, however, i noticed it turn a bit and stops again so i suspect it must be a switch or something.

Any advise to what i should look at first.

Last edited by ak505; 01-22-2020 at 05:12 AM.
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Old 01-22-2020, 07:02 AM
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Quote:
Originally Posted by ak505 View Post
Hi all.
I need some advise.
My X5 E53 3.0d's pusher fan does not come one, this results in the air-con not working when the vehicle is standing, while idling obviously, when the vehicle moves the air-con works fine.
I noticed the pusher fan does not turn on, however, i noticed it turn a bit and stops again so i suspect it must be a switch or something.

Any advise to what i should look at first.
The best way to determine the operation of the Aux. fan is via INPA, DIS or ISTA, where you can manually turn the fan on (in INPA its called the e-blower, in the activation menu).

I hear you can also pull the connector off one of the A/C pressure switches (cannot recall which one - high or low) and this should cause the Aux. fan to run but I cannot confirm this is so (or that it works on the diesel cars).

There is no "switch" that operates this fan - it is under PWM control from the DDE and it's rather hard to diagnose properly without INPA, DIS or ISTA. The fan itself contains a complex controller and motor driver circuit.

If you see even small twitches from the Aux fan, I think you can assume that the main fuses are OK....
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Old 01-22-2020, 07:12 AM
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Post #56 here...

https://xoutpost.com/bmw-sav-forums/...fan-bad-6.html
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Old 01-24-2020, 04:14 AM
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If you have a BMW specific scanner or software a bad fan will show up in the DME module.
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Old 01-24-2020, 11:49 AM
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Or you build a PWM signal generator to see if it is the FAN.
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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