Transmission ECU Cali T

Don't wanna sound like I'm asking a dumb question or a bad statement..but you replaced an expensive transmission assembly..and STILL has the same issue you were trying to solve?

Forgive me..but can you describe what issue you are having? Have you taken it to a competent shop or dealer to have a proper diagnosis done?

 

It is true that the transmissions have a marriage file so the ECU know what you have. However, I have swapped transmissions in Challange cars without changing the file. I was told by a higher up in the tech support field that it will work but it may take much longer for the systems to understand each other. I don't know the particulars or the what and why.
Having said that, it is just what I was told. I haven't done this on a street car so I am not sure what you will experience.

 

The only thing that will occur without a marriage file is the serial number in the TCU will not match the serial number on the gearbox. Ensure the software levels are correct and Perform a self learn and drive the car. I would just replace the Speed sensor it is very common for the speed sensor to cause multiple errors relating to the SAP. I would suggest installing a new speed sensor, all the pressure sensors and the temperature sensor in you original box and it will be good to go.

 

Keep in mind. Ferrari has completely changed the way they sell the "SAP" kits..if you can even call it that anymore. And the pricing is EYE WATERING. Have a look on Eurospares and all will come clear. I wish you the minimal amount of wallet damage..

 

I believe i'm in the same "boat" you are in with my '11 Cal. Started acting up a few weeks ago; multiple code errors (When its cold car runs fine - but once it heats up I get crazy codes and lose even gears and reverse) - we think its an ECU issue, bad ground? or worse... the internal sensors but oddly car runs "fine" when its cold..hmmmmm

 

That's symptoms of a hydraulic problem. Usually when the speed senor acts up you will only be able to shift odd gears 1,3,5,7. Losing a gear completely randomly seems like a solenoid issue.

First things..change that fluid. Do it twice if it hasn't been done in a while. On the rare occasion this can solve a few problems. It's a very inexpensive try.

 

brand new fluid (used spec shell DCT & gear oil from Ferrari) - done last month. Car has run flawless the past 30,000 miles / 3yr that I've owned her. Just started acting up out of nowhere 2 weeks ago. My mechanic thinks it could be a "bad ecu" (in the trunk) potentially.... fingers crossed

 

Speed sensor was already replaced. My guys said he has never seen that fail 2x!!!

 

He is correct..but things happen. As a side note, I have seen broken forks in the gearbox side..if you pull it down again, it may not be a bad idea to inspect that area also.

Just to add a bit of something, I have never replaced a TCU in a Cali, 458, f12, 488 etc. As far as I know, they are not.known to cause issues. But it is possible I have been lucky.

 

I read on this board about 1 guy who had "bad wiring" and ground issues; and that fixed his problems - I know that after these basic checks, if the ECU work after all the ground tests are done (and ECU swap)- then obviously its going to be something electronic internally ~ i'm just trying to save 20 hour of labor!!!!

 

TCU turned out fine (after swapping with a new/test one) - so the issue(s) got narrowed down to a speed sensor (since parameters were all the place while driving), and problems with the 2nd gear sticking (thinks it could be syncro issue); harness will be checked when the subframe gets dropped (before the tranny gets opened = last resort!) will update as info comes my way...

 

The only thing the marriage file does is change the serial number of the transmission. Everything else can be reproduced by performing a self learn on the gearbox. If you had a failed speed sensor it will often through all kinds of other codes as it will usually pull the power supply down and have shift position and pressure issues as well. This could likely have been fixed with speed sensors, updating the pressure sensors and temperature sensors.

Install your new used transmission perform a full self learn with the scan tool and it should operate perfectly.