Electrical draw cooling pump staying on

Barry Mechanic Virginia Posted   Latest   Edited  
Resolved
Electrical
2013 BMW X3 xDrive28i 2.0L (N20B20A) 8-spd (GA8HP45Z)

I have been working on this car off and on now for about a week I have finally narrowed down the draw to the electrical water pump stays on with the car off I cant find any good wireing diagrams to tell me what controls the pump I dont want to guess and just throw a pump at this thing any one have any good ideas or suggestions???

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Thanks
Babu Owner/Technician
Virginia
Babu
 

vin needed

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Saifullah Diagnostician
Ontario
Saifullah
 

Change the pump. Dedicated LIN line drives pump. Just change it. So common.

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Alan Owner/Technician
Mississippi
Alan
 

Unplug electronic fan module See if it goes away. And second I have to agree with the other person replace pump. Good luck

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Larry Owner/Technician
California
Larry
 

Alldata shows the pump w/powertrain in the non-oe diagram. 2 wires to dme, 1 to ground,1 power from 50a fuse 7 in underhood distribution box, but not sure if thats what you mean? or if your looking more towards strategy? How long does it run? dme will afterrun pump for quite a while if it thinks it needs to, so it can fool you. what other faults did you have to start and are any returning? How…

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Barry Mechanic
Virginia
Barry
 

Brand new battery and the pump is on with the engine cold hasent started in two days comes on as soon as you hook up the battery and stays on 4.6 amp draw on batt kills it overnight

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Obie Technician
Washington
Obie
 

Replacing the pump requires a bleeding procedure that is much easier with a proper scanner. You could also check for any pump codes in the DME.

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Jason Technician
New York
Jason
 

Temp on hottest, blower on lowest, key on engine off, hold throttle to floor for 20 seconds. I can have the process started before you even hook up the scanner.

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Agree
Michael Owner/Technician
Texas
Michael
 

Need to check for communication codes. We replace a lot of pumps, but sometimes you will have codes for battery sensor, oil sensor, and alternator. Which can all be on the same communication line.

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Helpful
Larry Owner/Technician
California
Larry
 

If DMEs were more robust I wouldnt worry, but… they arent. Based on the ease of duplication, plug in a pump with out installing and verify that your problem has gone away at koeo at least.

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Barry Mechanic
Virginia
Barry Resolution
 

Thanks to all your information was great and very helpful I replaced the pump reset the battery and power setting and the car is fixed thanks again for the help

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