THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning M235i Battery Drain, Electric Water Pump Constantly On

Post Reply
 
Thread Tools Search this Thread
      02-21-2019, 01:13 PM   #1
HectorM235
Registered
0
Rep
3
Posts

Drives: Bmw M235i
Join Date: Feb 2018
Location: Puerto Rico

iTrader: (0)

M235i Battery Drain, Electric Water Pump Constantly On

Hello Guys

Im new here and I hope I can fix my problem.

I have a 2014 M235i and the car drains the baterry in less than a few hours.
It appears that the water pump stays on either the car is off and lock, it stays on all the night. I change the battery twice in less than 2 weeks, I change the IBS that is the negative cable from the battery, I unplug the Jb4 thinking that maybe was that but no, I disconnect the alternator and still on. The mechanic calls me and tell me that is the Ecu, that when he unplug the cable the pump goes off. Right now Im without car and the people that are helping me doesn't know what is.

I hope someone give me some ideas or help me with this

Thanks guys
Appreciate 0
      02-21-2019, 01:23 PM   #2
bbnks2
Colonel
1207
Rep
2,025
Posts

Drives: 135i N55
Join Date: Jan 2017
Location: NY

iTrader: (0)

Quote:
Originally Posted by HectorM235 View Post
Hello Guys

Im new here and I hope I can fix my problem.

I have a 2014 M235i and the car drains the baterry in less than a few hours.
It appears that the water pump stays on either the car is off and lock, it stays on all the night. I change the battery twice in less than 2 weeks, I change the IBS that is the negative cable from the battery, I unplug the Jb4 thinking that maybe was that but no, I disconnect the alternator and still on. The mechanic calls me and tell me that is the Ecu, that when he unplug the cable the pump goes off. Right now Im without car and the people that are helping me doesn't know what is.

I hope someone give me some ideas or help me with this

Thanks guys
I know there was a JB4 bug that caused this a while back on the E-series platform... But you stated you removed JB4 and it didn't go away so...
Appreciate 0
      02-21-2019, 05:18 PM   #3
Sylverlee
Captain
150
Rep
964
Posts

Drives: White 535i M-Sport, 911 GTS
Join Date: Jul 2010
Location: Irvine

iTrader: (2)

did you entirely remove the JB4? This was happening with my f10 too. Common problem.
Appreciate 0
      02-21-2019, 06:53 PM   #4
HectorM235
Registered
0
Rep
3
Posts

Drives: Bmw M235i
Join Date: Feb 2018
Location: Puerto Rico

iTrader: (0)

Quote:
Originally Posted by Sylverlee View Post
did you entirely remove the JB4? This was happening with my f10 too. Common problem.
How do you fix it?
Appreciate 0
      02-22-2019, 09:48 AM   #5
Sylverlee
Captain
150
Rep
964
Posts

Drives: White 535i M-Sport, 911 GTS
Join Date: Jul 2010
Location: Irvine

iTrader: (2)

There was a fix they offer, where you splice into a different power source. I said no thank you, and went Dinan instead.
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 08:34 PM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST