Tricore Remapping
VTune Leeds can remap all Tricore protected ECU fitted to most vehicles from 2010 onwards. As with all our remaps all original files are backed up on disc and we have manufactured replacement anti-tamper bolts.

VTune Leeds now has the capability to remap the 1.6tdi engine fitted in the VAG group of cars. Including VW Golf, Caddy, Audi A1, A3, Seat and Skoda vehicles. These vehicles are using the 1.6tdi engine and are fitted with a Continental ECU. As with all our remaps these will be written for the vehicle and are not a generic file.

Vtune Leeds remap all Tricore protected ECUs

‘Tuning Protection’ for the Infineon TriCore TC-series processors (Bosch MED17/EDC17)
On the CR TDI and 1.8/2.0 Turbo Petrol engines with the latest Bosch ECU generation (MED17 for the petrols, EDC17 for the diesels, I’ll just refer them to MEDC17 from now on...), Bosch has implemented some new security measures to protect against aftermarket reprogramming of the engine control unit calibration data.
On chip tuning and OBD tuning there are checksum calculations; ME7.5 ECU (1.8 Turbo) for example, contains about 70 different checksum blocks, and the result values are filtered through various functions to have a secure method of verifying data integrity. At around the same time, Bosch started using access control on the outside ECU reprogramming (that is what we call the OBD flashing nowadays). It’s usually a normal challenge-response scheme with a seed-key algorithm.
Of course, the chiptuning industry kept on and solved these functions to have methods of correcting the checksums, and to have OBD programming capability of these ECUs.
About 7-8 years ago, Bosch started using RSA signatures to control the ECU contents. Early on, just a 256bit RSA, then 512bit RSA, and nowadays, on these new ECUs, its a hash from a 1024Bit RSA signature. Something thats virtually un-crackable with traditional brute force methods.
Since these keys are yet to be solved, tuners have had to find other ways of programming the ECUs.
When the MEDC17 ECU family was released, a backdoor was found in the programming algorithm. Originally this hash was checked only after certain conditions were met. If they are not met, it was not checked. So the programming method made sure that was the case every time they programmed the ECU.
This ‘Tuning Protection’, as it is commonly called, just means that this backdoor has been sealed, and the ECU always checks the hash validity after every OBD programming attempt. If this is not valid, it sets a flag in the memory that prevents the car from starting.
Our tools can detect this and we can over write the file via use of the equipment we have invested in.
That is why, for now, on these protected ECUs, we need to open the ECU to use a processor function built in the TC17xx-series processors, which allows us to boot and reset the ECU at any given moment from pins on the motherboard. This way the ECU does not detect it as being an OBD programming attempt, and skips the hash validity check.
It also does not leave any signs of tuning. Once the work has been completed the ECU is resealed and we have the original anti-tamper bolts for replacement.

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