Kokako65
Posts: 1
Joined: Sat Sep 23, 2017 4:40 am
Delivery Date: 23 Sep 2017
Leaf Number: 201356

Health of 12 Volt battery

Sat Sep 23, 2017 3:16 pm

Hi as a new owner of a 2nd hand 2106 Leaf I have been teaching my wife to drive it. We go in a tangle trying to select D when the READY state had not come up (later due to her light pressure on the foot brake), but the immediate display was a Major alarm light and 12 Volt battery fail light causing a bit of panic being a few miles form home. We swapped driving seats, got going and returned home to investigate via the user manual. Looks OK now but I but a volt meter on the 12 volt battery terminals and was surprised to see 18 volts registered. This is way above the 14 volts i expected but the electrolyte level was correct and no gassing was evident. Has any one taken a similar voltage reading ?

LeftieBiker
Posts: 6946
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Health of 12 Volt battery

Sat Sep 23, 2017 5:07 pm

I assume you tested with the car's power on? try 15 minutes after turning the car off. And please use one of the several existing topics on the 12 volt system.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

GerryAZ
Gold Member
Posts: 1414
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Health of 12 Volt battery

Sat Sep 23, 2017 6:47 pm

Kokako65 wrote:Hi as a new owner of a 2nd hand 2106 Leaf I have been teaching my wife to drive it. We go in a tangle trying to select D when the READY state had not come up (later due to her light pressure on the foot brake), but the immediate display was a Major alarm light and 12 Volt battery fail light causing a bit of panic being a few miles form home. We swapped driving seats, got going and returned home to investigate via the user manual. Looks OK now but I but a volt meter on the 12 volt battery terminals and was surprised to see 18 volts registered. This is way above the 14 volts i expected but the electrolyte level was correct and no gassing was evident. Has any one taken a similar voltage reading ?


18 volts is much higher than I have ever seen on either 2011 or 2015. Are you sure your voltmeter is accurate? If voltage were held at 18 for any length of time, cells would gas and likely be very low on electrolyte. As you found, failure to apply foot brake while pressing the power button to turn on will result in the car going into accessory mode instead of ready mode. Float voltage of LEAF 12-volt battery is typically a little lower than most gasoline engine cars (13.0 to 14.5 depending upon conditions).
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

Return to “New Members & Newbie Questions”