I understand there's a different thread on this topic but that one's already way too long.
About 2 weeks ago, I woke up to a dead car. I "jumped" it for a few mins and it worked fine for the day. A few days later, same thing. Again, jump and go. Starting this Saturday, the darn car has drained the 12V battery all but one day. On Sunday, I purchased a new 12V battery - manufactured in May - and installed it. The next day the car was out again, and 3 more consecutive days after that.
I just put a voltmeter on the 12V battery and got this:
- While EV charging to 100% = 14.2V
- At rest, 10 mins after charge completed = 12.132V, already too low
- Removed the 12V neg terminal, inserted an ammeter = after an initial spike of 2.7A when first reconnected, it settled to 165mA draw.
- Disconnected the 12V battery completely and after 10 mins, it had sprung back up to 12.6V
I'm not sure what is normal in this car but 165mA seems high to me and it would kill the 12V battery in no time unless the DC-DC converter recharges it - which evidently does not happen. I have the battery on a separate charge now and will charge it for 12 hours to try again. BTW, the original battery I removed from the car recharged fine and it rests at ~12.8V.
I have only had 12V battery issues when stupid Carwings doesn't work and it hasn't worked for me solidly since June 1st. I have a call into Nissan for a related but different issue (plugged and charging status not showing in app/website) and have told them several folks here have complained about the same. I'm sure they jotted that down on their block of ice so they don't forget. Two weeks after reporting my issue to Nissan, the status has always been "escalated, no news from L2 support".