2017 Leaf makes a clunking noise
- Thread starter Gina5270
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powersurge
Well-known member
Unless it has a case of gas.... Why would it be concerning?
Let's cut back on the unhelpful responses, please. I'd also be concerned under the above circumstances.
I'm guessing it could be a periodic checking or charging of the 12v battery, from the traction battery?
Is the car plugged in when you hear the clunking? not that it would make a difference but it might help for troubleshooting.
Is the car plugged in when you hear the clunking? not that it would make a difference but it might help for troubleshooting.
OrientExpress
Well-known member
Sometimes the ABS system will cycle itself during cold startups. This makes a groaning clunking sound from the front of the car for a few seconds. This is a normal occasional sound.
goldbrick
Well-known member
I've never heard my 2017 make those sort of noises but a few things come to mind...as mentioned, it could be a relay switching on/off for some reason, eg to charge the 12V battery. Another possibility would be some sort of thermal shift as parts cool. I don't know what could get hot enough to cause that but on an ICE car it's not uncommon for the muffler, etc to pop occasionally as it cools and contracts.
PrairieLEAF
Well-known member
I just witnessed it when I was working in the garage today. Some clunking sounds, with only the third, blue dash charge light flashing (car unplugged). Perfectly normal operation--it's just adding some charge to the 12V battery, as mentioned.
I imagine that in order to run the DC-DC converter to add charge to the 12 volt battery, then the main contactors have to close. That probably is the source of the sound.
GaleHawkins
Well-known member
LeftieBiker said:
That sounds feasible. When I totally kill the power when wait for the wife to get off from work I hear sounds sometimes and just assumed it is a relay that is unloading, etc.
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