Landrover TD5 ECU attempted clone - fail and need some advice please

[swisstuner]

Hi all,

So I have a 1999 model Manual Landrover Discovery 110 Td5 with 120 PS.
VIN: SALLDHM88XA163038
ECU: NNN500020 (original)
ECU: MBS000080 (donor)
Problems:
1. came in no start
2. fuel pump activates
3. turns over
4. does not start
5. used an immo off donor ECU - started no problem

attempting to build new immo off ECU but Ive clearly made a mistake in ECU selection
The original ECU is a newer NNN500020 version with flashable microchip
The donor ECU is not flashable (so no tuning for this customer anymore)
What I need is to get this car running and get it out of here ASAP, we dont see many of them and they are not worth the time

What I have done so far:
1. installed donor ECU without modification and attempted start - it started - did it 4 times. Check engine light is on, error codes on system were multiple.
2. Attempted EEPROM swap, identified ATMEL 93C66 SOP8 in original NNN500020 ECU. Attempted to read it with EEPROM reader - nothing, cannot get a connection..Ive tried a million times
3. Swapped it over to the MSB000080... no start.. no fuel pump.
4. Returned original EEPROM from MSB000080 into ECU and attempted to start car again - no start this time, no fuel pump either. Checked soldering, all is fine.. just no start.
5. Pulled MSB000080 EEPROM out (I believe its a 24- ATMEL AT24CO1) and read it.. I get all 0000 in every field.
6. Connected original NNN500020 ECU with original EEPROM installed and confirmed that fuel pump activates but no ignition. Engine turnsover but does not start.

I think the MSB000080 EEPROM is locked or something because VINs dont match. Thats my guess. Honestly I dont know.

Thats about as far as I got. Tools available to me and tested so far:
1. KESS V2 - useless since cannot flash older chip
2. Autel MS906BT - can read codes but they are permanent cannot delete
3. EZP2023+ EEPROM reader and software
4. JLR SDD version 163. October 2022 - useless the system is too modern for this car

Any help and advice is greatly appreciated. I read through the other TD5 Ecu repair thread and cannot proceed any further.
What would really help is specifics about which one of these 4 legged prick things is the actual EEPROM (although I think I have it correct).
And of course any direct solution or offer of solution is appreciated.

Thanks in advance.

Swisstuner (not so capable with Landrovers )

[tango]

eprom in msb is 93c44
eprom in original flashable ecu will be 93c66
sounds like you have killed the eprom because the ecu's are not backward compatible
you should have got another flashable ecu not any msb types because these are all otp only ecus

[tango]

what is the problem with original ecu ?
cant you repair this ?
problem you have now tho is you have messed up the original eprom so will have lost most data like injector coding and immo info etc

[fuzz1]

Hi
I would give the job to someone who is used to those things it will be better. The eeprom are quite resistant. They might still be saved. Yeah data might still be there.

[swisstuner]

Thanks for your advice and support. I was able to read the EEPROM from the NNN500020 but i think you are all correct and its toast. Every single option I select reveals 0000 in every field.
I am not sure what the problem was with the original ECU, it was tuned a long time ago - ran for 18 months. Then it just stops working.
Can you recommend someone to send the ECU too?

[swisstuner]

When reading using 93 protocol the NNN500020 EEPROM 93C66 reads FFFF in all categories - ie empty. That explains why it wouldnt start the car I guess.
When reading using 93 protocol the MSB000080 EEPROM 93C46 I get data using 8bit and 16 bit (it shows only slight changes at 16 bit and still retains 8 rows). Some other protocols simply reveal FFFF for the last 8 rows on 16 bit so Im definitely no EEPROM guy but that to me means its an 8 bit EEPROM.

I suppose I could try writing the data from the 93C46 to the 93C66 since its empty and I have nothing lose. If it writes I at least know the EEPROM is salvagable. Still I think the best solution is to send both ECUs to an expert before I really screw it up.93C46 MSB80 EEPROM read.jpg

[fuzz1]

Hi
What do you mean by other protocol? You need to choose the right one. Not trial and error

[swisstuner]

Hi
What do you mean by other protocol? You need to choose the right one. Not trial and error

On the EEPROM reader software there are multiple manufacturers that have a 93C66 and 93C46 8 and 16 bit configuration. Since I cannot identify the manufacturer of these EEPROMs I have tried EVERY manufacturer both 8 and 16 bit. Thats what I mean. On both ECUs the EEPROMs are old and I cannot read the information on them - even with a decent high powered magnifying glass. Just cant.

[tango]

normally would be atmel if i remember correctly