SOLVED: Manual Transmission -- Transmission Oil Pump Working?

[RocketyMan]

Has anyone been able to successfully use the service routine in ISTA that activates the transmission oil pump as for purposes of draining/filling transmission oil? I cannot hear anything actually "activating" and am wondering if the oil pump is even working.

I even made sure to make sure the transmission is in neutral...closed the door...pushed in the clutch. No idea as there are absolutely no audible sounds. Maybe I have a bad pump or something because I am now curious if I have enough oil in the transmission when I replaced it with fresh oil.

[RocketyMan]

Here is the part on realoem: https://www.realoem.com/bmw/enUS/par...&q=11417834496

#9 as in the picture.
I'm starting to wonder if I have the full fluid fill on the trans or not.

[--Aramis--]

I have done it when i have flushed my manual gearbox, no problem i have followed ISTA procedure.

When i have activated the gearbox oil pump some 0,5l of very dark oil flow off the gearbox.

Refill the gearbox with castrol Transmax Z oil, the gearbox is perfect now.

Edit: you could hear very distinctly the sound of the pump, and when the gearbox is empty of oil, check the metal filter cartridge

[bshowalter]

I have done it using the procedure in ISTA. The pump is loud, no doubt you'll hear it if it runs. Make sure the car is in ACC mode with the key, if not, it won't activate.

[RocketyMan]

Okay. Thank you guys for confirming it is indeed LOUD because I am hearing nothing.

I'm going to further investigate. When I took out the filter screen from before, it was clean with no particulates or anything trapped within the mesh.

Good point on making sure the IGN is set properly. I did set it to ON and not ACC. Maybe I can try that next.

[RocketyMan]

First step in any electrical issue is...[checking] wiring.

I verified the wiring to the pump. TIS is wrong...again (unless someone else can confirm actually better than the documentation provided). X6200 is perhaps incorrectly marked instead of X6011 like it ought to be.

Anyway, I have continuity from the DME pin 5 (which is GREY and not red) to pin 1 on the X6011. And from the pin 1 of PUMPE to the connector all the way down to the pump 2 pin connector (pin 1 on pump connector) I have continuity.

I think this is suggesting I have a bad pump.

[RocketyMan]

Okay. I guess I MAGICALLY fixed it...somehow.

I reconnected the oil pump two pin connector and then just jumped the red wire on X6011 to the battery positive. Indeed it sounded TERRIBLE, but actually ran! When it was running, it sounded kinda gritty and then got better.

I'm wondering if it was the connectors fault on the pump. It did look a little grimey and perhaps wet when I pulled it out. I just simply wiped it up and reconnected it after verifying continuity to the connector. So now it works!

[RocketyMan]

So BTW, there CANNOT be any faults on the transmission. I found this out by disconnecting the transmission oil-temp sensor as to move it out of the way of the fill port since I got the oil pump magically working. When I went to try and run the service-routine, it didn't work. Then as soon as I plugged in the temp sensor, it started working again (there is a slight debounce time).

FYI, I was curious how much oil I was under, and when filling and running the pump constantly there was about 10 oz of oil that I could add. Hopefully I didn't cause any issues with a lower oil level.