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#1
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AUX fan woes
I have quick AUX fan question. So the aux fan in my '06 3.0D is not spinning when the AC is on or when the coolant hits 85c. However I dont think it is the fan itself, as it DOES spin half a turn when the car is started. So i figured I would call on the vast wealth of knowledge and experience here before wasting hours chasing the issue. given the symptoms, what would be the most common cause of the fan not running when it is supposed to, even though it has power and does spin when the car is started? |
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#2
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Sounds like you need to replace the fan. Here's my DIY guide to get you going:
https://youtu.be/N_K0KPHsteA |
#3
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I would have thought the fan itself would be ruled out, as it is spinning momentarily on start up as it is supposed to...just not under other conditions? |
#4
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Foxwell scanner will run the aux fan and I've heard you can force it to spin by unplugging the AC pressure sensor.
It's pwm controlled so you can't run it by applying power. The part spin at start convinces the computer it's ok even if it's not.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#5
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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 |
#6
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Engine coolant goes near 100 C before it activates the fan. Like suggested test the fan first with diagnostics by activating it via DDE.
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E39 530dA -02 M-Sport Messing metallic E53 X5 3.0dA -06 Sport Stratus grey |
#7
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I'm not so sure about that. I only thought it turned maybe 1/6 to 1/4 of a turn for its self test I'm going to look a little closer it's hard to do yourself.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#8
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If you remember your basic electricity, a dc motor free spinning becomes a dc generator. The electrical signal generated by this spinning is sent back to DME. The DME recognize this electrical signal and log the fan as good. If the DME don't see this electrical signal it log a bad fan fault code.
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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 |
#9
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Oh of course I remember motor/generator lessons but ANY motion will create voltage. I was pretty sure I saw only like 1/4 of a turn in the past butt I'm usually not in front of the car to see when the car is started.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#10
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If he could unclip the front grille in front of the fan I would do that and see if the fan spin freely by hand. Could be the fan bearings are shot.
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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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