Petrol Fuel Pump Controller Diagnosis

[absolutezero273c]

Had another thread where I was concerned I had a fuel filter issue, with the fuel pump being replaced 2.5 years ago, due to intermittent no start issues. Turns out, as I'm sure many of you already know, fuel pump issues are common issue with this model.

Fast forward, I just replaced the fuel pump on my wife's e70 maybe a month ago and she just experienced another no start issue. Tried 3 times to start but to no avail. The 4th attempt it finally started.

This happened with 1/4 tank. I thought maybe then it was the siphon jet in the fuel tank that maybe failed. I gathered fuel system data via the hidden OBC menu before fill up and after. All numbers look good:


Hidden menu 06.00
1/4 tank:

Tank L R S Stats = 2.6 20.6 23
Tank Ohm- L R = 893.6 391.6

Full tank:


Tank L R S Stats = 41.9 37.5 79
Tank Ohm- L R = 085.1 100.9


I had already replaced the fuel pump relay in the earlier thread.

I believe what I am left with is diagnosing the fuel pump ECU.

Has anyone gathered data/tested the fuel pump ECU using ISTA/D or INPA and can share your steps/experience?

I can't seem to locate any mention of diagnosing the petrol fuel pump ECU on xoutpost. Only discussion I can find is diesel models.

I searched and was able to locate this page that walks through testing but they aren't using ISTA/D or INPA. I checked every controller in ISTA/D last night and couldn't find any place to obtain info on the fuel pump controller.