12.23 volts is low, possibly low enough to indicate a problem. Charge the 12 volt battery, clear the codes again, and try again.* I checked the 12V battery and it shows 12.23V with multi-meter, so at least it seems 12V battery is not an issue?
Measuring the battery under no-load doesn't always give useful information. The car doesn't need more than the 12.3 volts you measured; it should have started fine -- IF the battery could actually deliver that voltage. But, voltage could be falling dramatically as soon as the car tries to draw current from the battery. I had such a situation, where the battery measured 12.5V but as soon as a load was attached dropped to under 10V. You might try measuring the voltage, and then turn on the car's high-beam headlights and measure again to see if there's a large voltage drop under that load. If it drops more than 1V with the high beams on, the battery is suspect. If it drops 2V or more, the battery is toast. Don't turn the car on during this test, otherwise the car's DC-DC converter will invalidate the result.silvermask123 wrote:Thanks for the quick reply.
Are battery tenders good to use on Leaf?
What should the voltage output show ideally, so I can at least remove that as suspect once I charge the 12V battery?
Also, just making sure - disconnecting the 12V battery does clear out codes right?
Thisdavewill wrote:If you had LEAFSpy, you could read out any diagnostic codes.
Often when people are working through these problems, they are intermittently getting starts, or have tried charging the battery, etc... A load test is easy and revealing. I've since gotten a dedicated load tester; they're inexpensive and now I use it during periodic maintenance to keep tabs on the batteries in both our vehicles. It's a 100-Amp unit so it's a more decisive test than just using the headlamps.LeftieBiker wrote:Given a situation in which the 12 volt battery has been left alone for a long time (no external charging or large drains with the car off) then the rest voltage has proven a pretty good indicator of usefulness - IF you assume that anything below 12.4 volts is problematic.