E46 320D 2000 electric fan does not switch off, runs all the time. Connector voltage? - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 09-13-2009, 09:37 AM
n00b
 
Join Date: Sep 2009
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spacemanwayne is on a distinguished road
(Thread Starter)
E46 320D 2000 electric fan does not switch off, runs all the time. Connector voltage?

Hi guys

Hope you can help. My electric fan runs all the time, so i have to pull out the big 50 amp fuse everytime. I sent it to BMW but i am not convinced they fully diagnosed the issue. The fan remains on whether the a/c is on or off. I have done a test on the voltages going through the connector that goes to the fan shroud. I did it the next morning so the engine was cold.
I am referring to the connector which powers the electric fan, there are 3 wires, the one is main power(red), the other is earth(brown), there is also a black/green wire and this is the wire i am trying to figure out, i think this is the signal the system sends to the fan to control the speed, am i correct? And i assume the higher the voltage the higher the fan speed.
I disconnected this plug from the fan, and used a multi meter plugged into these wires. Positive from the meter connected to the black/green wire and earth on the brown wire. The voltage is around 5.6volts on this wire and when just started, and when the temperature gauge reached maybe just one needle width passed exactly half on the gauge, the voltage was around 5.8v. Is this normal, i was expecting a rather large variation. I tried googling and could not find anything.

Any help on this matter is appreciated

Thanks
Wayne
spacemanwayne is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 09-13-2009, 09:41 AM
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Posts: 14,698
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
My first look would be for a stuck relay. Many cars have the electric fan powered regardless of the ignition switch so it can cool the radiator in the odd event that it's over temp spec after shutting down.

BMW

Sig by zeaq
witeshark is offline  
#3 (permalink) Old 09-13-2009, 09:45 AM
n00b
 
Join Date: Sep 2009
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spacemanwayne is on a distinguished road
(Thread Starter)
Hi whiteshark

Thanks for the reply. Where can i find this relay? I look at the fuse box but there is nothing for it, there is just the 50Amp fuse.

Thanks
Wayne
spacemanwayne is offline  
#4 (permalink) Old 09-13-2009, 10:03 AM
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Posts: 14,698
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
Maybe diagrams from realoem.com can help.

BMW

Sig by zeaq
witeshark is offline  
#5 (permalink) Old 09-13-2009, 12:01 PM
n00b
 
Join Date: Sep 2009
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spacemanwayne is on a distinguished road
(Thread Starter)
Hi Witeshark

Thanks for the website, its very useful!!! I had a look there, and cant find anything though. I also looked around at other forums and it appears that this relay is part of the fan shroud and it cannot be replaced seperately. It is also referred to as the final stage controller, correct me if i am wrong. I tried to source this part from Bosch but they dont have it listed, must be a bmw bosch thing. As for my problem, I think this is what bmw has concluded is broken. I was hoping to find out if the voltages going to this unit on my car was in the normal range, if someone could confirm what i measured and got was indeed normal, i will go get a new fan. I am worried about replacing the fan, which cost 2 arms, a leg and a tooth and the problem is still there.

Kind regards
Wayne
spacemanwayne is offline  
#6 (permalink) Old 09-13-2009, 12:27 PM
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Posts: 14,698
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
At this point, you've exceeded what I know about that car and those components...

BMW

Sig by zeaq
witeshark is offline  
#7 (permalink) Old 09-14-2009, 09:45 AM
n00b
 
Join Date: Sep 2009
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
spacemanwayne is on a distinguished road
(Thread Starter)
lol
I will still update this post though as i go along through finding the solution to this problem i have.
thanks for you help though
spacemanwayne is offline  
#8 (permalink) Old 09-14-2009, 10:06 AM
OMFG another one!?
 
witeshark's Avatar
 
Join Date: Aug 2004
Location: Miami FL
Posts: 14,698
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice witeshark is just really nice
Best of luck with it!

BMW

Sig by zeaq
witeshark is offline  
#9 (permalink) Old 11-07-2009, 03:18 PM
n00b
 
Join Date: Oct 2009
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
gemnilvr is on a distinguished road
hello, i know its a little late but it is a common problem and it is the blower motor unit or also called the fsu - final stage unit! its an easy diy project!! the part is about $75 and takes about 30 min!! good luck!!
gemnilvr is offline  
#10 (permalink) Old 11-08-2009, 07:52 AM
1st Gear Member
 
CanadianWraith's Avatar
 
Join Date: May 2009
Location: London, Ontario Canada
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
CanadianWraith is on a distinguished road
Quote:
Originally Posted by gemnilvr View Post
hello, i know its a little late but it is a common problem and it is the blower motor unit or also called the fsu - final stage unit! its an easy diy project!! the part is about $75 and takes about 30 min!! good luck!!
uhhh......no. the fsu is for the climate control unit inside the car

CanadianWraith is offline  
#11 (permalink) Old 11-08-2009, 09:53 AM
n00b
 
Join Date: Oct 2009
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
gemnilvr is on a distinguished road
Cool Uhhh! Yes it is, but...

Quote:
Originally Posted by CanadianWraith View Post
uhhh......no. the fsu is for the climate control unit inside the car
The original post states that the fan was continuously running! The fsu controls the fan and this fixed the problem I was having with my car when the fan was running while the car was off! It was also keeping my car from going into sleep mode so the orange light next to the shifter would stay on. All I'm saying is it's a common problem and could be good information for someone having these problems.
gemnilvr is offline  
#12 (permalink) Old 11-08-2009, 10:04 AM
1st Gear Member
 
CanadianWraith's Avatar
 
Join Date: May 2009
Location: London, Ontario Canada
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
CanadianWraith is on a distinguished road
the fsu controls the blower motor fan not the cooling fan for the motor

CanadianWraith is offline  
#13 (permalink) Old 11-08-2009, 10:19 AM
n00b
 
Join Date: Oct 2009
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
gemnilvr is on a distinguished road
Yeah, I thought this was the fan they were speaking of bcuz they said the fan stayed on with the a/c on or off! My bad!
gemnilvr is offline  
#14 (permalink) Old 11-08-2009, 12:11 PM
1st Gear Member
 
CanadianWraith's Avatar
 
Join Date: May 2009
Location: London, Ontario Canada
Posts: 258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
CanadianWraith is on a distinguished road
no biggie

CanadianWraith is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E46, E90)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
1999 E46 323i (manual) primary electric cooling fan doesn't shut off monsterkovell 3-Series (E46, E90) 3 05-31-2007 12:52 PM
2000 320d land9 3-Series (E46, E90) 3 03-30-2006 05:23 PM
Fan Runs After Shutdown- Need Help Hownowevilcow 5-Series (E12,E28, E34, E39, E60) 2 05-31-2005 01:27 PM
Fan Runs After The Car Is Turned Off former_d1 M-Series (M1, M3, M5, M6) 5 05-06-2005 01:10 PM
328i E46 - Electric cooling fan stays on. timmay_lars 3-Series (E46, E90) 1 07-26-2004 01:10 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome