2018 updated GM security keeps rolling out
Hi All,
Unfortunately there is some more bad news for the GM aftermarket tuning industry, it appears a new ECM has arrived on some of the petrol/gas engines with the same security as the 2017+ E41 (L5P) Duramax ECM.
The 2018 Malibu using the 1.5L Direct Injection engine is using a new ECM referred to as the E88.
Tuning will not be possible with this ECM as it contains high levels of security including SHA-256 signatures on all calibration segments with no way to bypass them and no way to get in to the CPU using BDM/JTAG access. The CPU's used also have built in Crypto modules too. So my suspicion is GM are doing this in preparation for the 'Over the Air' updates they said will come in 2020 rather than to specifically keep tuners out, obviously the current security is not good enough once a vehicle is 'on-line' so this is the solution, really tighten it up.
Given GM have typically used ECM's for a 5 to 6 year cycle it probably means we will start to see replacements for the E92, E80, E39 etc that employ this new security too :frown:
The security used and what can (or can't) be done about has already been discussed in depth here when the E41 came out.
https://forum.efilive.com/showthread.php?27554-2017-Duramax
And some further reading:
https://patentimages.storage.googlea.../US8930710.pdf
Cheers,
Ross
