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Old 10th June 2024, 16:17   #1
Rick-sta
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Default replacing a diesel ECU using TOAF

the ECU on my dad's 75 diesel auto appears to have developed a fault. The car has intermittently not been starting (just keeps turning over). Leave it alone for a little while and on reattempt it starts up and runs absolutely fine. Once running it never has any issues.

Had it checked on a t4 by Kevin at MG Rover Repair Center Wickford and the ECU was showing errors including a corrupt eeprom. The faults were cleared but come straight back. He has advised the ECU needs replacing and has seen this problem several times on the diesel models.

I know a virginised ECU is required in order to code it in with a t4, however if I were to obtain a used ECU with the exact same part number has the original one, can it be coded in using TOAF by simply backing up the original ecu using TOAF and uploading those files to the replacement used ECU, or is that wishful thinking?
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Old 10th June 2024, 16:38   #2
Yorkshire GOC
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I would PM Big Russ if i were you - he will know i am sure.
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Old 12th June 2024, 12:47   #3
Jamiewelch
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Quote:
Originally Posted by Rick-sta View Post
the ECU on my dad's 75 diesel auto appears to have developed a fault. The car has intermittently not been starting (just keeps turning over). Leave it alone for a little while and on reattempt it starts up and runs absolutely fine. Once running it never has any issues.

Had it checked on a t4 by Kevin at MG Rover Repair Center Wickford and the ECU was showing errors including a corrupt eeprom. The faults were cleared but come straight back. He has advised the ECU needs replacing and has seen this problem several times on the diesel models.

I know a virginised ECU is required in order to code it in with a t4, however if I were to obtain a used ECU with the exact same part number has the original one, can it be coded in using TOAF by simply backing up the original ecu using TOAF and uploading those files to the replacement used ECU, or is that wishful thinking?
The "security" areas are write once and locked software wise. They can be overwritten by putting the ECU into boot mode, you can then write over the entire flash, but you'll need a bench setup and a mapping tool capable of doing bootmode flash on an EDC15 (A Galletto 1260 can do this and is fairly cheap). You'll also need to sort the EEPROM as that is what syncs it to the EWS.

You would have to hope there isn't any corruption on the original too. I can generate original files for the VIN if needed. But you'd have to get the stuff to read and write the flash chip (I assume you still have EEPROM stuff)
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