NessieLeaf
New member
- Joined
- Nov 5, 2017
- Messages
- 2
I'm having the same issue with my 2015 SL Leaf. This problem never occured prior to the 2G-3G TCU upgrade. After owning the vehicle for just shy of 3 yrs the warning light came on while I was driving and then the 12v died overnight while charging. The dealer replaced the 12v. The problem returned within a couple weeks. Then the dealer replaced the 3G TCU. The problem returned within a couple weeks. The dealer could not repeat the problem in the shop. They asked me to bring my EVSE charger in. I have a EVSEUPGADE.COM 240v modified Nissan (Panasonic) 4.8kw charger. I've been using the charger for almost 3 years with no problems. I bring the charger to the Nissan dealer and then they did nothing more, told me it wasn't a warranty issue and tried to charge me for the diagnostic work, even though they never tested the charger or even plugged it into the Leaf. Considering that an owner may use a variety of chargers from many different mftrs, I feel they are just looking for an excuse not to resolve the problem. I don't believe it is the charger due to the randomness of the issue. After getting the car back from the dealer I charged overnight with the same charger and had no problem. I'm no longer in warranty and the problem has not resolved itself.
It seems like the 12 volt just slowly drains. The warning light comes on after charging overnight then goes off later in the day after driving and then restarting the Leaf. This will happen for a couple days and then the 12v will be dead and not open doors, etc. That should never happen since it should disconnect loads when the 12v gets too low and the onboard DC-DC charger should be maintaining the 12v. The dealer tech (the dealer has only one) had Nissan involved with the issue so at this point I feel that Nissan doesn't have a clue to what's going on. I'm seeing several threads regarding this issue and lots of Leaf owners looking for work-arounds which tells me there is a faulty component or firmware issue that has not been addressed by Nissan.
I wonder how many Leafs are affected by this? Perhaps a class action suit is needed to get resolution. Does anyone know of a permanent fix to the draining 12v issue?
It seems like the 12 volt just slowly drains. The warning light comes on after charging overnight then goes off later in the day after driving and then restarting the Leaf. This will happen for a couple days and then the 12v will be dead and not open doors, etc. That should never happen since it should disconnect loads when the 12v gets too low and the onboard DC-DC charger should be maintaining the 12v. The dealer tech (the dealer has only one) had Nissan involved with the issue so at this point I feel that Nissan doesn't have a clue to what's going on. I'm seeing several threads regarding this issue and lots of Leaf owners looking for work-arounds which tells me there is a faulty component or firmware issue that has not been addressed by Nissan.
I wonder how many Leafs are affected by this? Perhaps a class action suit is needed to get resolution. Does anyone know of a permanent fix to the draining 12v issue?