I never suggested that he replace his 12V battery rather that he should eliminate it as a first step in troubleshooting before he could go to the next step.
Intermitted problem with starting 2022 SL Plus. Any suggestions ?
- Thread starter HKSP1413
- Start date
Help Support My Nissan Leaf Forum:
Wasn't you but many here can't get beyond it. Yes, by all means charge, test, 1st, but then move on.
Far too many have said it can pass a load test and still be bad? Huh? not if it was tested correctly.
HKSP1413
Member
Thanks Steve. Appreciate it.
Car is going back to the dealer, let's see if they can find out where the problem is.
Car is going back to the dealer, let's see if they can find out where the problem is.
Really! I found many, and some I've bought, used, and also bought by my automotive customers.
Your other statement is also incorrect, e.g. some have a resolution as low as 10ma.
Yes really!
DC Current: 40A/400A ±(2.5%+5)
That is one of the one you linked too.
Max permissible dark draw on the Leaf is 0.050 amps, that is not even above the error window.
You can not find a draw of the size we are talking about 50 thousandths of an amp with a clamp on meter like that.
Yea, a 1 amp draw you might see, but that isn't what we are dealing with.
Read the spec's on any of them, you will not find a clamp on meter that will go down that low on a DC meter.
I am not saying they don't make DC clamp on ammeters, I am saying you'll not find them with the resolution needed.
If you know of a clamp on that does 10ma DC post a link to it. I've only seen AC in that range.
Last edited:
This meter, which I previously referenced (Amazon) and have, will measure 10ma, for you that's ".010 A." I bench tested it using an analog amp-meter,
which will measure micro-amps. This digital clamp meter accurately measures 50ma, for you that's "50 thousandths of an amp".
My meter from the link;
which will measure micro-amps. This digital clamp meter accurately measures 50ma, for you that's "50 thousandths of an amp".
My meter from the link;
![[2024 Upgraded] Retractable Car Charger, SUPERONE 69W Car Phone Charger with Cables Fast Charging, Gifts for Men Women Car Accessories for iPhone 16 15 14 13 12, Samsung, Black](https://m.media-amazon.com/images/I/31-ZCpiDr2L._SL500_.jpg)
Where is this absolute number referenced? The standby current for a BEV is typically not as critical as for an ICEV,
particularly for the Leaf, given that the main battery is used to charge the 12V battery which doesn't occur for an ICEV.
Obviously, when the standby current exceeds a few hundred milli-amps, the Leaf's 12V battery charging algorithm
becomes inadequate, and the time between the key-off & key-on is of concern.
Many places in the service manual. RFM
I beginning to see why some have a 12 volt problem and others don't!.
"I checked for a draw with my VAT and didn't see one, must be a cheap lead acid battery"
From the manual of the meter you referenced. Look at the accuracy at the lowest full scale reading of 6 amps.
That is over 100x the current you are trying to read accurately, then add in the 2.5%.
Yeah, I love clamp on meters, and they have their place, but when looking for small currents, they can not meter the accuracy needed in this case.
That is over 100x the current you are trying to read accurately, then add in the 2.5%.
Yeah, I love clamp on meters, and they have their place, but when looking for small currents, they can not meter the accuracy needed in this case.
Where specifically, provide a link or copy a page. It's rare for an OEM to provide a standby vehicle current draw.
Last edited:
The lowest scale provides an adequately accurate measurement based on my testing for checking a standby current draw.
I've used it many times for different measurements below 100ma on numerous vehicles. The key point in using it, is that
one can quickly identify an excessive draw above 100ma.
Last edited:
50ma is the limit of all dark loads combined, so once that total exceeds that, you have to parse out the smaller draws to find the one or more that are high enough to push it over the limit, so you need resolution well below that point.
Your statements are based on your guesses,
My statements are from the equipment mfg in both cases.
The Leaf service manual is available for free download up to MY 2015 from the NICO site, I suggest you do that and read it.
Which page is likely different depending on which manual you read, but it is there in several trouble code logic trees for diagnosing problems. I would guess in the EVC section as well as the BC section.
.
2.
3.
4.
E
: Current direction mark
Check that all of the electrical equipment is turned OFF.
Close and lock the door. Check that the room lamp is OFF.
Measure dark current.
Reference value
C
D
Install ammeter side probe (2) to negative terminal cable of 12V
battery (1).
A
B
F
: 50mA or less
Copy, paste from the manual!
Your statements are based on your guesses,
My statements are from the equipment mfg in both cases.
The Leaf service manual is available for free download up to MY 2015 from the NICO site, I suggest you do that and read it.
Which page is likely different depending on which manual you read, but it is there in several trouble code logic trees for diagnosing problems. I would guess in the EVC section as well as the BC section.
.
2.
3.
4.
E
: Current direction mark
Check that all of the electrical equipment is turned OFF.
Close and lock the door. Check that the room lamp is OFF.
Measure dark current.
Reference value
C
D
Install ammeter side probe (2) to negative terminal cable of 12V
battery (1).
A
B
F
: 50mA or less
Copy, paste from the manual!
That's an overly naive troubleshooting approach, i.e using absolute numbers. Sounds like you've worked for car dealers as a "tech", right?
I'm done, Now you are getting insulting. I have provided the spec's and when they don't support your opinion, you resort to attacking me, You have no idea about my experience, I could ask the same of you, but will not.
Similar threads
