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#21
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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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#22
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but we are also in the middle of a pandemic that is causing pandemonium with logistics and stocking. I have had things that should be overnighted from a city 4 hours drive away take over a month to arrive....So, Having not needed one up until this point, as stated I was hoping getting my hands on one was not the only way to diagnose a fan issue...I was hoping someone with a more intimate understanding of the X's fan control systems would have a simple "oh yeah, just unplug this...or just bridge that, and the fan will run if its not shagged" instead of potentially waiting weeks just to be able to diagnose it, then weeks again for the correct part to arrive after figuring out what it needs. In short...sorry for asking a fucking question...your highness. |
#23
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And I'll be even more direct than I was in my previous posts here ... Don't believe what you read or see on the intertubes on this. It IS more complex than most think. If you've got a True RMS voltmeter, you can measure voltage on the control wire. In my case, doing all the above and a few more allowed me to become fully convinced that the power and signal going to the fan all made sense, and were there. So with the fan not spinning, it only remains to swap in a new fan. For a still unknown reason, my PA Soft BMW Scanner 1.4 did not run this time. I was going to try installing it from scratch on a different laptop, but at this point, I don't think it would tell me anything new. And in defense of @upallnight, in exchange for the occasional rough comment like that, he has probably the highest batting average on here for tough problems. I'll take that over friendly wrong answers any day. Good luck getting this solved.
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2001 X5 3.0i, 203k miles, AT, owned since 2014 Last edited by oldskewel; 09-15-2020 at 11:17 AM. |
#24
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UPGrayd, a couple of the members here can be annoying for sure but most of us are happy to help fellow X5 enthusiasts any way we can. Just shrug them off.
If I ever doubt my fan is operational, I simply unplug the AC pressure switch shown below with engine running and AC on and the fan will run full song after 5 seconds. This will at least let you know you have an operating fan but may not diagnose your DME controlling it dependant on engine temp. For that you need the cable you have ordered and a copy of INPA installed on a PC. My guess you have a fan out or going out and the quick AC pressure switch test will let you know. Mine is a 3.0L M54 model but I would guess your diesel M57 would have the same AC pressure switch.
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Digital Competition Systems The older I get... The faster I was... No Fear Last edited by Overboost; 09-15-2020 at 11:35 AM. |
#25
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Oh and by the way have a G'Day mate. Don't need to put anything on the barbie for me.
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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 |
#26
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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 |
#27
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Worth a crack though!
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Wayne 2005 BMW X5 3.0d (b 02/05) 2001 BMW F650GS Dakar (b 06/01) |
#28
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My 2001 3.0i looks just like yours, but nowhere near as clean. I just ran that test on mine, measuring the fan control signal as I have been doing, and confirm it works as you say. So yes, that is a very easy test. Maybe THE easiest, as long as you know your AC works. Just turning the AC on should make the fan spin, even if very slowly. Disconnecting that plug should ramp it up to almost full speed within a few seconds. Specifics on the testing I did: AC Pressure, as measured in Foxwell (units = Volts): engine cold, about 70*F ambient. Ignition ON, engine stopped, AC off, cold: 1.25V ... connector removed: 5.00V Engine running: 1.24V Engine running, AC on: 1.76V, rising ... connector removed: 5.00V When the AC was turned on, the fan control signal dropped to 12 .. 11V, as before. When the AC pressure sensor connector was removed, it very quickly ramped down, at about one Volt per second, ending at about 2.0V, which should be almost top speed for the fan.
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2001 X5 3.0i, 203k miles, AT, owned since 2014 |
#29
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That’s some very helpful information oldskewel
Sent from my iPhone using Tapatalk Pro
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#30
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Thank you mate, My apologies I did miss that reply. I definitely have no fan with A/C on (the ac going warm when sitting at a set of traffic lights momentarily is what actually drew my attention to the fan in the first place). I am dealing with a death in the family at the moment, but over the weekend I will try to get my hands on a 100 Ohm resistor and see what I come up with. |
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