Cooling fan problem

jt335i · 05-02-2016, 10:57 AM

lichtgelb · 05-02-2016, 12:13 PM

Quote:

Originally Posted by riso1988

I found my issue, figured I'd post my findings for anyone who may go through this in the future.

There was a faint green stain on the exterior of the fan wiring bundle at about the midway point on top of the radiator. I peeled back the outer insulation and in noted a small path of corrosion on the signal wire. As it turns out it was completely corroded and not therefore not conducting to the fan. I cut it out at soldered the wires back which fixed my fan issue and 2EFE code.

Good job finding something so obscure. It almost looks like someone had stuck a test light on that wire looking for voltage at some point.

07lilredwagon · 05-02-2016, 03:12 PM

good job tracing that down!....a mechanic probably would have thrown a new fan in and told to you to go home as "its good to go"....only to have it reoccur on you...

next you would have needed a new computer module, temp sender, cooling fan sender.....

JP

riso1988 · 05-04-2016, 07:40 AM

Thanks guys!

Hah you're right JP, that could have gotten very $$ and out of hand.

unrulyteach · 07-12-2016, 09:49 PM

Quote:

Originally Posted by mike3000fl

yea mine sounds like a jet engine.

anytime the outside air temp is over 85 and i have the AC button on, it roars.

turn AC button off, it calms down.

Exact same thing my car does

PourBoi-Jay · 09-14-2016, 09:54 AM

I'm having a similar problem. My cooling fan won't turn on either. My car overheated in traffic a few days ago, and the fan never kicked on.

I have the 850w PPK/335is fan and wiring, and have just installed a brand new unit.

Water pump and thermostat were replaced in the spring.
No codes.
All fuses and relays are good.
Wiring harness appears to be fine. I peeled back the insulation tape, and found no issues with any of the wires.
I am getting 12v at the harness. And the signal wire (black and blue wire) is getting a static 4.4v from the DME
Coolant temp sensor appears to be working fine (unplugged it, and the car ran horribly)

Any other ideas?
I've been beating my head against a wall for a few days now

WiL335i · 04-20-2019, 10:25 PM

Old thread but did someone get the solution to this problem?

05-02-2016, 10:57 AM	#23
jt335i Major 263 Rep 1,225 Posts Drives: 2010 E92 335i Monaco blue Join Date: Jan 2010 Location: Tampa, Fl iTrader: (0)	__________________ 2010 BMW 335i: Monaco blue metallic/Premium+Sport Auto-Steptronic, BMW PE, Cobb Stage 2 2005 Mustang GT: Redfire metallic/5-spd/Ford Racing (Axle backs, silver Bullitt wheels)/K&N CAI/ Diablo Sport Predator Tuner 1997 Toyota Corolla 1983 Mercedes Benz 380SL Roadster
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05-02-2016, 03:12 PM	#25
07lilredwagon Captain 40 Rep 679 Posts Drives: 07 328 wagon Join Date: Dec 2012 Location: New York iTrader: (0)	good job tracing that down!....a mechanic probably would have thrown a new fan in and told to you to go home as "its good to go"....only to have it reoccur on you... next you would have needed a new computer module, temp sender, cooling fan sender..... JP
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05-04-2016, 07:40 AM	#26
riso1988 Second Lieutenant 36 Rep 216 Posts Drives: '18 440i xDrive GC, '06 330xi Join Date: Jul 2014 Location: Staten Island, NY iTrader: (0)	Thanks guys! Hah you're right JP, that could have gotten very $$ and out of hand.
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09-14-2016, 09:54 AM	#28
PourBoi-Jay Captain 326 Rep 613 Posts Drives: 2009 335i M-Sport Join Date: Jun 2014 Location: Central CT iTrader: (3)	I'm having a similar problem. My cooling fan won't turn on either. My car overheated in traffic a few days ago, and the fan never kicked on. I have the 850w PPK/335is fan and wiring, and have just installed a brand new unit. Water pump and thermostat were replaced in the spring. No codes. All fuses and relays are good. Wiring harness appears to be fine. I peeled back the insulation tape, and found no issues with any of the wires. I am getting 12v at the harness. And the signal wire (black and blue wire) is getting a static 4.4v from the DME Coolant temp sensor appears to be working fine (unplugged it, and the car ran horribly) Any other ideas? I've been beating my head against a wall for a few days now __________________ 2009 E90 335i Black Sapphire \|\| Oyster \|\| M-Sport \|\| 6spd BMW-Performance\|\|OEM+\|\|Cobb\|\|Wagner\|\|CP-e\|\|AFE\|\|Forge\|\|ER\|\|BMS\|\|Lux\|\|RB\|\|Bridgestone\|\|Manz o\|\|Bilstein\|\|Eibach\|\|Whiteline
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04-20-2019, 10:25 PM	#29
WiL335i Private 18 Rep 83 Posts Drives: 2011 335i Coupe Alpine White Join Date: Jun 2011 Location: Winchester, CA iTrader: (0)	Old thread but did someone get the solution to this problem?
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