kentklineman2014 wrote:Thank you Cwerdna,
That was super helpful. But are you saying that even with Leafspy I may not be able to get an accurate reading of the SOH of the battery??
kentklineman2014 wrote:I was told that dealers can reset the dash and the onboard diagnostics to look like there are 12 bars, but that leafspy would reveal the true state of the battery. Is that so? It sounds like you are saying only if it is THE ORIGINAL battery? Thank you for any clarifications you care to provide.
A legitimate purpose of resetting the BMS (well, probably some other module that we're calling the BMS) is if the battery pack is replaced, the dealer must reset it via Consult III Plus (https://www.aetools.us/products/nissan- ... -iii-plus/
). Unfortunately, we've found more than one case where someone unscrupulous has reset the BMS w/o replacing the pack. http://daveinolywa.blogspot.com/2014/11 ... -read.html
was one of the first cases we heard of. Fortunately, it had a happy ending (http://daveinolywa.blogspot.com/2014/12 ... olved.html
). That buyer got lucky as it was down to 8 capacity bars before the 5 year/60K capacity warranty ran out --> free replacement pack.
From the case I pointed to earlier, it seems that Leaf Spy is useless in showing the health of the battery until the BMS... err car, has relearned the pack. Until it's done relearning, the Ahr SOH, and Hx figures will be artificially inflated, just like the capacity (bar) indicator.
(The reason why I'm making goofy references to the BMS is that there's a BMS module inside the battery pack. So, there's something in the car that's being reset and probably not the module inside the pack.)