Hey all,
I finally succedeed to unlock and flash an ECU for a Fiat punto 1.9JTD 80HP 0281001955 351392.
I flashed the ECU with a tuned map I got in the forum.
Everything was ok and the car starts and runs good.
BTW I have a minor issue I am trying to solve.
I have the red engine warning light on that brings me to a fault error due to a checksum fail. Other than that the car works properly.
I do not know how to fix this problem, I spent time studying and reading and made several attempts with MPPS to checksum the file but nothing worked.
I have the file read from the ECU but if compared to the ori file for this ECU model there are some differencies, I assume this is due to bad reading. I tried with winols as well but I am confused about the procedure to follow.
ANy help please?

Option 1: Put ori FULL flash from your read and check warning light. If ok remap with WinOLS, check CHK with WinOLS and write MAPS only (not full flash) without CHK change from some flash program.

Option 2: Get ori FULL flash from internet, check CHK with WinOLS and write FULL without CHK change. Check warning light. If ok remap and write MAP only without CHK change.

Option 3: Get ori FULL flash and write FULL in boot mode, if ok then remap with WinOLS, check CHK with WinOLS and write FULL in bootmode without CHK change.

ceecee wrote:Option 1: Put ori FULL flash from your read and check warning light. If ok remap with WinOLS, check CHK with WinOLS and write MAPS only (not full flash) without CHK change from some flash program.

Option 2: Get ori FULL flash from internet, check CHK with WinOLS and write FULL without CHK change. Check warning light. If ok remap and write MAP only without CHK change.

Option 3: Get ori FULL flash and write FULL in boot mode, if ok then remap with WinOLS, check CHK with WinOLS and write FULL in bootmode without CHK change.

Thanks for your reply. I am not sure about your advice so I will ask some questions before.
I am currently working with 2 ecu just in case one goes bricked. I am only flashing on the donor ecu and not on the original one.
There is an issue I am facing. Using MES I can see the HW number of the original ECU but I can't read it form the donor ecu...coult it be a problem in the donor ecu? The car runs good anyway.
Options 1 & 2: I am reading with MPPS and I believe the file I save is the FULL flash your are referring to.
If so, I tested it and I have no warning light. I did the same test with the ori file (FULL flash) from the web for this ECU and I have the same situation of NO light. I only have the warning light on with the tuned file that has a different CHK off course.
I am not yet confident with OLS so I will have to practice before remapping. I have the mapped file and I wonder how I can get the modified parts copied into the origianl ECU file.
Option 3: I have to study about boot mode procedure.
I waish to add some information more....the orignal ecu I can see the hw number with MES while the hw number does not show up will test and let you know.

correct picture with two screenshots

Ok HW number issue in donor is wrong flash. If with ori flash HW and light is ok it can be bad tune, WinOLS or MPPS.
Good thing is this ecu is difficult to brike. Flash always can be restored from bootmode.

Try tune file from ori with other WinOLS. If ok it's, if not I tryed other flash program.

Ok I was thinking about a bad flashing in the donor ECU, I got this one used and it might have been bad flashed by previous owner.
I bought for a small amount and it is a test ECU. As it is my first attempt I did not want to have the original one bricked. So i flashed the 5p08c3 eeprom to make it work with my car and started flashing tuned maps.
As explained, for the time being I flashed the donor ECU several times with following results:
- file read from donor ECU itself (read->re-flash). Car works good; no warning light;
- file ORI from forum. Car works good; no warning light;
- file read from my OWN ECU. Car works good; no warning light;
- tuned file. Car works good; warning light ON;
Next test I will do is flashing my OWN ECU with tuned file.
I am not sure about what I should flash in boot mode...29F400 (where do I get the file?)? ...5P08 has been flashed already.
I believe I do not have the right tools. I have chip programmers and MPPS but no KESS or similar.
But how it is possible the car is running with no warning even with a bad flash?
Thanks ...and good louck to your country for the virus battle!!!

Oh you flashed eeprom! It is the problem! HW number is in eeprom. If you changed eeprom in a bad way it produce errors.

If you want to use donor ecu you can virgin eeprom or clone your eeprom and flash. If hardware and software version is exactly the same in both no problem, you can use ori eeprom inside donor flash. If HW/SW is different you must to clone eeprom and flash.

The more important is to have ori eeprom/flash unedit. After you can do changes.

MPPS I think read is always full from OBD and write you can choose full/maps. For bootmode with similar ecu I use the simple Galletto 12.50 with KKL cable and EDC15C generic it write full flash easy. For eeprom ME7EEprom v1.3 or 1.4 read OBD and write bootmode.

If you need help ask.

Grazie! Molta forza.

ceecee wrote:Oh you flashed eeprom! It is the problem! HW number is in eeprom. If you changed eeprom in a bad way it produce errors.

If you want to use donor ecu you can virgin eeprom or clone your eeprom and flash. If hardware and software version is exactly the same in both no problem, you can use ori eeprom inside donor flash. If HW/SW is different you must to clone eeprom and flash.

The more important is to have ori eeprom/flash unedit. After you can do changes.

MPPS I think read is always full from OBD and write you can choose full/maps. For bootmode with similar ecu I use the simple Galletto 12.50 with KKL cable and EDC15C generic it write full flash easy. For eeprom ME7EEprom v1.3 or 1.4 read OBD and write bootmode.

If you need help ask.

Grazie! Molta forza.

Buenos dias,
yes I had to flash the eeprom as the car did not start with the donor ecu (ECU and software model is the same). I desoldered the chip and put it back than the car started. As you know the eeprom model 5P08C3 is an old one and the only way I could flash it was as 95040 chip so maybe some bit did not copy exactly. So if the ecu HW model is in the eeprom it is not a big issue. It does not affect the system at all.
Now I need to solve is to get the red engine warning light off when I flash the tuned map.
As said next test wil be flashing the tuned map in my original ECU.
I am trying to work with winols but is looks quite comlplicated.
Ola

Problem solved it was the eeprom. As my programmer does not support 5P08 I had to go around. So read eeprom as 95080 and flasehd 95040. This was the only way to make it work. The car starts but the red engine dashborad light is on. I swapped the eeprom and problme is gone, I will fix as soon as I have another programmer.
So nothing to do with CHK. File is ok

Yeah, weld/unweld + programmer have those issues.