2006 330i water pump going off then coming back on - BMW 3-Series (E90 E92) Forum

Kdbing · 10-09-2012, 12:35 PM

Hi, has anyone experienced an issue where your electronic water pump comes on during times of the day, then shuts off when you open then door, and comes back on again when the car goes into sleep mode. I'm assuming the water pump is bad but it doesn't overheat, and drives perfectly fine when its running. The problem is, the water pump comes on and off during the night and drains my battery. The maddening part is, it responds to the bleeding procedure so I assume the communication bus is intact.

Kevin

GoRomeo · 10-09-2012, 12:43 PM

is your car overheating? do you have a warning light on dash? Weird...

Kdbing · 10-09-2012, 12:48 PM

No, no overheating or warning light, runs fine water pump cycles while off and in sleep mode draining the battery, this is my fourth day in jumping my baby.

Kevin

GoRomeo · 10-09-2012, 01:01 PM

Are u sure is the water pump? It can also be your fuel pump maybe?

Kdbing · 10-09-2012, 01:06 PM

pretty sure it is, left the hood open, and cap off while it does this and its cycling water.

GoRomeo · 10-09-2012, 01:16 PM

I see. Not sure but I would check the relay that controls the water pump if any? Maybe it got stucked? I am not an expert but it does not hurt to check. Otherwise google ur issue if someone else have had this issue. I have never heard about this... good luck!

Kdbing · 10-09-2012, 02:03 PM

Yeah I know. Ive googled the issue and didnt really turn up any specific issues that mimic my problem. This was my last resort in posting here. I don't want to throw parts at the problem. My buddy hooked it up and there was a dme fault, and a water pump fault. All of this started after my alternator died and my car overheated. Since clearing the faults the DME fault or water pump fault they didnt come back, but the problem still persists. I'm at my wits end on this one, the funny thing is, it comes on after it goes into sleep mode and off when I open my door.

Kdbing · 10-09-2012, 02:05 PM

Water pump replaced at 100k jan 2012 with thermostat. Alternator just replaced.

Kevin

Kdbing · 10-09-2012, 03:14 PM

anything?

Kdbing · 10-09-2012, 04:22 PM

bump

GoRomeo · 10-09-2012, 04:27 PM

What about your battery? Go to Auto Zone and have them test the battery and alternator. I would do this If I were you...

Kdbing · 10-09-2012, 04:47 PM

I just replaced the alternator, this caused my overheat originally. The battery was replaced in august of this year, but considering Ive been waking up all hours of the night just to go listen to my water pump still running, makes me think its the pump or computer itself. When I drive, I don't get an alert saying battery not charging, or battery low.

Kdbing · 10-09-2012, 06:36 PM

really need some help on this one.

Kevin

GoRomeo · 10-09-2012, 06:51 PM

You will have to take it to dealer and get it diagnosed. Once they find out whats wrong with it, take it to Indy shop. Good luck and keep us posted...

Kdbing · 10-11-2012, 10:36 AM

still persists. Battery swapped for good measure.

Kdbing · 10-16-2012, 11:04 AM

Turns out it was the water pump. Though it ran fine, responded to bleeding, i guess it wasn't communicating with the ECU to turn off when going into sleep mode.

ytulip · 11-01-2012, 02:33 PM

"Turns out it was the water pump. Though it ran fine, responded to bleeding, i guess it wasn't communicating with the ECU to turn off when going into sleep mode."

So how did you fix it? A new water pump? reading through this thread, it seems to me that your water pump is less than one year old.

10-09-2012, 12:35 PM	#1
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	!!!SOLVED!!! 2006 330i water pump going off then coming back on Hi, has anyone experienced an issue where your electronic water pump comes on during times of the day, then shuts off when you open then door, and comes back on again when the car goes into sleep mode. I'm assuming the water pump is bad but it doesn't overheat, and drives perfectly fine when its running. The problem is, the water pump comes on and off during the night and drains my battery. The maddening part is, it responds to the bleeding procedure so I assume the communication bus is intact. Kevin Last edited by Kdbing; 10-16-2012 at 11:01 AM.
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10-09-2012, 02:05 PM	#8
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	Added info Water pump replaced at 100k jan 2012 with thermostat. Alternator just replaced. Kevin

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10-09-2012, 12:43 PM	#2
GoRomeo Major Drives: 330i Join Date: Feb 2006 Location: San Diego CA Posts: 1,109 iTrader: (0) Garage List 2006 330i [4.00]	is your car overheating? do you have a warning light on dash? Weird...

10-09-2012, 12:48 PM	#3
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	No, no overheating or warning light, runs fine water pump cycles while off and in sleep mode draining the battery, this is my fourth day in jumping my baby. Kevin

10-09-2012, 01:01 PM	#4
GoRomeo Major Drives: 330i Join Date: Feb 2006 Location: San Diego CA Posts: 1,109 iTrader: (0) Garage List 2006 330i [4.00]	Are u sure is the water pump? It can also be your fuel pump maybe?

10-09-2012, 01:06 PM	#5
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	pretty sure it is, left the hood open, and cap off while it does this and its cycling water.

10-09-2012, 01:16 PM	#6
GoRomeo Major Drives: 330i Join Date: Feb 2006 Location: San Diego CA Posts: 1,109 iTrader: (0) Garage List 2006 330i [4.00]	I see. Not sure but I would check the relay that controls the water pump if any? Maybe it got stucked? I am not an expert but it does not hurt to check. Otherwise google ur issue if someone else have had this issue. I have never heard about this... good luck!

10-09-2012, 02:03 PM	#7
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	Yeah I know. Ive googled the issue and didnt really turn up any specific issues that mimic my problem. This was my last resort in posting here. I don't want to throw parts at the problem. My buddy hooked it up and there was a dme fault, and a water pump fault. All of this started after my alternator died and my car overheated. Since clearing the faults the DME fault or water pump fault they didnt come back, but the problem still persists. I'm at my wits end on this one, the funny thing is, it comes on after it goes into sleep mode and off when I open my door.

10-09-2012, 03:14 PM	#9
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	anything?

10-09-2012, 04:22 PM	#10
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	bump

10-09-2012, 04:27 PM	#11
GoRomeo Major Drives: 330i Join Date: Feb 2006 Location: San Diego CA Posts: 1,109 iTrader: (0) Garage List 2006 330i [4.00]	What about your battery? Go to Auto Zone and have them test the battery and alternator. I would do this If I were you...

10-09-2012, 04:47 PM	#12
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	I just replaced the alternator, this caused my overheat originally. The battery was replaced in august of this year, but considering Ive been waking up all hours of the night just to go listen to my water pump still running, makes me think its the pump or computer itself. When I drive, I don't get an alert saying battery not charging, or battery low.

10-09-2012, 06:36 PM	#13
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	really need some help on this one. Kevin

10-09-2012, 06:51 PM	#14
GoRomeo Major Drives: 330i Join Date: Feb 2006 Location: San Diego CA Posts: 1,109 iTrader: (0) Garage List 2006 330i [4.00]	You will have to take it to dealer and get it diagnosed. Once they find out whats wrong with it, take it to Indy shop. Good luck and keep us posted...

10-11-2012, 10:36 AM	#15
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	still persists. Battery swapped for good measure.

10-16-2012, 11:04 AM	#16
Kdbing Enlisted Member Drives: e90 charcoal grey sedan Join Date: Jun 2011 Location: Phoenix, AZ Posts: 33 iTrader: (0)	Turns out it was the water pump. Though it ran fine, responded to bleeding, i guess it wasn't communicating with the ECU to turn off when going into sleep mode.

11-01-2012, 02:33 PM	#17
ytulip New Member Drives: 2007 e90 328i Join Date: Sep 2012 Location: Texas Posts: 7 iTrader: (0)	"Turns out it was the water pump. Though it ran fine, responded to bleeding, i guess it wasn't communicating with the ECU to turn off when going into sleep mode." So how did you fix it? A new water pump? reading through this thread, it seems to me that your water pump is less than one year old.