mogur wrote:I'm not sure I would classify rolling back the version of software as a definitive fix. It's more like a stop-gap in my opinion, until they can come out with something more permanent... We still don't really even know if there were some compressors out of tolerance with excess HV leakage, a VCU leakage parameter that was set too tight, all of the above, or something else entirely...
Right. If firmware B/C has the problem but not A, it could mean
- The change in firmware caused the issue
- Something else that changed along with the firmware caused the issue (A/C vendor supplied part ?)
Nissan needs to figure this out, make a fix and then regress the change to make sure that fix doesn;t cause some other problem.
Afterall, if they made a change from A to C, they did that for a reason - to fix some other issue. By rolling back, they need to find another way to fix the original issue.
My guess is Nissan will issue a service bulletin when they have a definitive answer.