Fuel pump relay location ?

[jwk87]

Hi all,

I have searched the forum to find the answer but could not find it.

Firstly does the 3 litre diesel e70 have a fuel pump relay and if so where is it located.

Secondly if it does have a relay is it the green one that I have noticed in Google searches?

Any help would be appreciated.

Jason

[Doug Huffman]

The fuel pump is energized by the EKP module.

https://drive.google.com/folderview?...&usp=drive_web

[cravin]

The fuel pump relay is a green 2 inch cube located in the trunk of the car. Open the trunk, on right hand side, there will be a panel that you can pull off. Lift the sponge cover and it will be right there.

[blue dragon]

Don't think that its there on the diesels, at least I couldn't find it.

[jwk87]

Originally Posted by cravin

The fuel pump relay is a green 2 inch cube located in the trunk of the car. Open the trunk, on right hand side, there will be a panel that you can pull off. Lift the sponge cover and it will be right there.

No there isn't one located there so I don't think Diesels have one.

It has to be the EKP module. When the car is running it runs fine, really well, but it is cranking on start up and throws a fuel pump error. I can get the car to eventually start.

A little bit of aero start makes the car start up first time. If it was the fuel pump then I would also have issues when the car was running.

I thought it might be the fuel pump relay but since it's diesel it must be the EKP module.

Thoughts??

[Photographus]

Hope this is useful for anyone out there as it was for me:

2012 E70 xdrive35D (diesel) here with 92K miles - started having issues not starting up like if it was out of fuel. Then showing several warnings on the screen:
DSC, Fuel pump and transmission errors. After reading this post I tried finding the fuel pump relay as suggested above - nope, mine doesn't have it. So I did a search for the EKP module - found it! Trunk, open the spare tire compartment then remove the back plastic storage bin that goes across the trunk. The EKP is located to the right side, pretty accessible. But get this: my BMW dealer wouldn't sell it to me as it must be programmed by the dealer. So ended up bringing the car in. $890 later ($448 in parts and $563 in labor minus some discount) I'm back in business but pretty disappointed as to what to expect with these new modern BMWs.

[jrd1971vw]

I've been chasing the same problem for months. Same exact problem you describe. Do you happen to know the EKP part number?

2010 X5d
104,000

[[email protected]]

Hoping to revive this thread.

Im having the same issue as Photographus

Keen on just running this past you guys before I get the module replaced.

I have been having trouble starting my 2008 E70 3.0d diesel lately. Problem has just become worse and worse.
Crank, but wont start.
Take the key out, wait 30 seconds, try again.
Sometimes it took up to 5 tries, and it would work.
Throws all kind of errors before it eventually starts: 4x4 and DSC fail, active steering, fuel pump fail. A couple of times the engine check light and that would stay on until the next positive start.
Eventually after a long cold night outside I just couldn't get it started.

Since these repetetive power off, ignition on cycles had worked in the past, it made me think that there was an issue with diesel delivery from the tank to the HPFP. Actually going outside and listening to the LPFP when pressing ignition(with no pressure on the brake), you can hear the pump start, then this gurgling sound as the diesel is pushed forward. This continues for say 5-10 seconds and you can hear the flow of diesel in the return lines eventually becoming free of air.
In the past, after several of these receptive cycles, the glow plug preheat would light up and the engine would start. Only once did it stall afterwards.

Had it pushed into the garage, and since I was planning on changing the diesel filter, I gave it a try.
Before connecting the outlet hose, I got the ignition on to force the fuel tank pump to start.
Good pressure into the bucket, so killed it pretty fast.
Wanted to try to start the engine, just for grins. Guess what. It started. Did it 3 more times, and it started each time. Hmmmm. That is just too easy a fix. Back to normal. No error codes.

So let the car sit for about an hour. (Have the battery on charge since the constant cranking starts have drained it somehow.
Next engine start is unsuccessful. Again unable to get it back to life and the dash is full of the error messages again........

Im trying to figure out if this problem is related to any of the 2 fuel tank pumps, or if it is the EKP module. Just understanding how the siphon and electric pump works could maybe help this.
Right now I am at 1/4 fuel tank. So that could explain the air gurgling when ignition is selected on. Never heard that really before(not so easy from inside the car), so that points to either one of the pumps. Then again, why would the dash go off like X-mas tree just because of a bad pump.
Taking that into the consideration points to the EKP module......

Worth mentioning that I experienced the no starting issue a couple of times earlier this year, like twice. One engine stall going out of the garage.

Last month had the car stall on me on the highway when accelerating. Happened three times, and just nursed the car home. Icarsoft showed bad injector nr 6. Showed the typical water damage from the cracked partition. Replaced the whole lot with Overhauled ones. Changed the glow plugs and controller while in there, since I had error message on all plugs. Car worked fine after this repair for about 14 days, and the engine was preforming great on the Autobahn. The only difference I notice was a bit longer crank. Nothing else.

The Icarsoft doesnt see any error messages now. I have tried accessing the DDE and DME when the car wont start, but the Icarsoft just can access it. As soon as the car starts, access is granted and I can read out the fuel pressures and watch the live stream.

Im on the road at work for the next 3 weeks, so I get some time to figure out what parts to order. Im just not sure taking the fuel tank apart and changing the pumps will fix this issue. The error codes points to the EKP.
BWTHDIK.

Any help from you guys would be appreciated.

[daytonatrbo]

The gurgling would indicate a loss of prime, which would be consistent with a difficult start.

Loss of prime would indicate a leak int the low pressure fuel system. If the leak is between the pump and the tank bulkhead, there would be no outward signs.

Repeatedly starting the engine with air in the fuel system will eventually damage your HPFP, so keep that in mind as you work through this.

Also, the lack of comms with the DDE when not running, and the light up dash would indicate a more serious electrical fault. What is the condition of your battery?

[jrd1971vw]

I had an intermittent no start issue. Crank with no turnover. It always eventually started within 10 minutes or so. iDrive dash warnings would almost always show up after a failed start-- "No warning tones", Airbag, DSC, 4x4, etc. Occasionally a CEL too. I always just cleared all codes/warnings with my scanner and they'd stay off until the next time it happened. Sometimes a month, sometimes the next start attempt. I'm relatively confident it was the black terminal 30 relay in the rear electric box... The contacts were crusty and corroded inside the relay and the no start issue hasn't happened since I replaced it.

2010 X5D 115K miles
3rd row