Does anyone have a spare E-diff ECU (part # 199174)

I'm sorting out an e-diff issue and was curious if someone had an e-diff ECU (part number 199174) that I could use temporarily?

Here's my current scenario:

- Car ran fine and was out on a cruise w/ the rest of the Ferrari club
- F1 system EV2 hose broke and leaked out F1 system fluid and rendered car immobile
- Purchased and installed new set of all 5 EV hoses
- Bled F1 system but unable to bleed e-diff with Leonardo due to non-responsive e-diff control valve (valve failed bench test)
- Replace e-diff control valve with new valve (valve passes bench test)
- Still unable to bleed e-diff system with Leonardo
- Car drives fine through all gears but e-diff/manettino light appears occasionally and F1 pump seems to run a bit more than normal

My shop mentioned that a previous car had a similar issue and the e-diff ECU was the culprit. I was curious if anyone here had access to one that I could use to test this theory since the part is plug and play but quite expensive to buy from the dealer.

 

Can you elaborate on what you think may be missing in his Leonardo process?

 

That's interesting, maybe I should just monitor it while putting some miles on the car this weekend?

As far as the torque I know he just bought a ~$400 wrench just for ediff selenoids, so I think the new one is installed properly.

 

Did your F1 fluid level change significantly after it 'self bled'? Mine is filled to just slightly over the metal disc in the reservoir/very tip of the dip stick

 

The more I think about it though, I'm not sure my issue is the same. My understanding is he tried to cycle the e-diff with the leonardo but the e-diff computer was not sending the signal/nothing was happening at the selenoid and therefore no fluid came out. This is what led to the idea of the e-diff ecu malfunctioning. Another car last month had been to ferrari of Denver twice to fix an e-diff issue and when my shop got it they ended up resolving it with the new ecu. He tells me my car is acting pretty much identical to hers.

 

I just picked it up from the shop yesterday with the understanding that the e-diff light would likely reappear.

- I started the car to leave and had no error lights (Race mode)
- I typically drive in Sport mode, so I set the switch to Sport. Upon changing the manettino setting the e-diff text warning immediately appeared on my dash followed by the manettino symbol. These alternated back and forth between images for the duration of my ~25 minute/12 mile drive home.
- I parked the car in the garage for ~1hr
- I started the car again and left to get lunch ~6 minutes/1 mile away. There was no e-diff/manettino error during this drive
- I started the car again to leave lunch (again ~6 minutes/1mile away). There was again no e-diff/manettino error during this drive.

Both drives were very casual, so I'm not sure the e-diff would have been 'active' from a handling perspective.

I'm planning to attend a lunch/drive on Sunday and will see if the e-diff/manettino error reappears during the longer drive.

If the error doesn't appear naturally, I'll try changing the steering setting to Race and see if that triggers it.

 

I don't think that's the case for this function since he's bled e-diff systems on other cars

 

Drove again today... The e-diff light came on before I got out of my neighborhood. I stopped for gas about 20 min later and after restarting the light never reappeared on the drive home.

I'd still like to try a different e-diff ecu if anyone has a spare. If need be I may purchase a used one to test.