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Discussion Starter #1
I have a 2015 500e with about 30,000 miles on it. I bought it a little less than a year ago with 15,000 miles on it. I have had the 12v battery run down a few times on it and have always been able to get it out of the limited power mode by disconnecting the 12v battery overnight. Last week I left the Level 2 charger on overnight and as it is an original JuiceBox, it does not shut off when the car's HV battery is charged. My normal solution to this is to unplug the car before bed each night but I got busy and forgot. I disconnected the 12v battery as I have done in the past but even after letting it sit disconnected for 24 hours it still will only go into Limited Power Mode. I have tried the key on/off method but am now out of ideas. When I turn the key on I can hear the HV contactors close and I can drive the car in Limited Power Mode but at only 9kW I can barely get up the little hill by my house.

Does anyone have any other suggestions? My nearest FIAT dealer is about 30 miles away and on top of that, the warranty expired last month as they told me when I had it in for the most recent recall update.

Thanks,

Craig
 

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The charger doesn't need to shut off when the car is fully charged. The car stops charging itself.

Apparently you don't have a 12V charger, & the stock 12V batt is otherwise unseviceable (cell caps irremovable). My friend's 500e 12V died last year, & it was a 2014 or 15, so you might just have a worn out 12V.
 

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Discussion Starter #3
According to the tech I talked to at the dealer the car tells the charger it is full and the charger powers down which then releases the contactors to the HV battery. I don't have any problems when I use the 120v Level 1 charger that came with the car and the dealer did not have problems with their Level 2 charger so we're thinking it's my Level 2 charger as it is pretty old.

I replaced my 12v battery a couple of months ago when the car went into Limited Power Mode another time. I have charged the 12v battery and its at about 12.8v right now.
 

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I got a combination USB charger / Voltage monitor that plugs into the 12V port in the console. I keep an eye on it to see if there are any changes or trends. Kind of wish it would show voltage when key was in off position, but this car apparently does not have that capability, unlike my Jeep Wrangler which has a charge port that is always live. However, I can see what the voltage is when the key is on, which is about 14.1 - 14.2 Volts, which is due to the DC to DC charger charging the battery when the key is on. I suppose if someone wanted, they could wire up an aftermarket charge port and run the wires directly to the 12V battery to get better and more relevant data.
 

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Only other things I can think of right now are:
-Maybe taking the HV batt to zero% would reset it. Sounds like you already took it to 100.
-Maybe a $20 OBD reader* & AlfaOBD app ($59, if the free version won't do it) could reset it

*at least 2 on this forum are using
 

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I have a 2015 500e with about 30,000 miles on it. I bought it a little less than a year ago with 15,000 miles on it. I have had the 12v battery run down a few times on it and have always been able to get it out of the limited power mode by disconnecting the 12v battery overnight. Last week I left the Level 2 charger on overnight and as it is an original JuiceBox, it does not shut off when the car's HV battery is charged. My normal solution to this is to unplug the car before bed each night but I got busy and forgot. I disconnected the 12v battery as I have done in the past but even after letting it sit disconnected for 24 hours it still will only go into Limited Power Mode. I have tried the key on/off method but am now out of ideas. When I turn the key on I can hear the HV contactors close and I can drive the car in Limited Power Mode but at only 9kW I can barely get up the little hill by my house.

Does anyone have any other suggestions? My nearest FIAT dealer is about 30 miles away and on top of that, the warranty expired last month as they told me when I had it in for the most recent recall update.

Thanks,

Craig
Hi Craig,
We certainly understand your hesitation in visiting your dealer. However, if you change your mind and would like some additional assistance, please send our team a private message and we would be happy to get you connected with a case specialist!
Alex
Fiat Social Care Specialist
 

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Discussion Starter #7
FiatCares

I wouldn't be quite so hesitant to take the car into the dealer if I could drive it. As it stands now it will only get up to 25 mph on flat ground. Given the distance to the dealer and the speed of traffic on the roads there it would not be a good idea. The other issue is that the last time the car went to the dealer for a recall (software update), it spent a week and a half there, despite my having an appointment beforehand.

Craig
 

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Discussion Starter #9
Electric Tire Shredder,

Thanks for the link, I just ordered the OBD connector, Amazon says it'll be here Saturday. I love driving the 500e but I sure miss the simplicity of the 1983 Volvo 242 that was my daily driver before the Fiat.

Craig
 

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Discussion Starter #10
Electric Tire Shredder,

I've read about that disconnect but am worried that there might be some code resetting required that would take dealer-level access to the system software. Maybe I should start a new thread about that and see if anyone has any experience with it.

Craig
 

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..ordered the OBD connector, Amazon says it'll be here Saturday. I love driving the 500e but I sure miss the simplicity of the 1983 Volvo 242 that was my daily driver before the Fiat.
I love the relative simplicity of my 500e! No gas, no oil, no belts, no plugs, no muffler, no fuel pump, no smog check, "forever" brakes... Just turn it on & go.

Please let us know the results (positive OR negative) when you get to try the OBD.
 

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Discussion Starter #13
Electric Tire Shredder

I'm glad you qualified your statement with "relative". The 500e is very simple when it is working but when it is not working it is far from simple and requires fairly advanced diagnostic tools to troubleshoot. While the old Volvo is a more complicated system the troubleshooting process is much more straightforward. I am a big car fan, I have 7 that I am currently insuring with a few project vehicles awaiting their turn. I bought the 500e because it made a lot of sense with my commute but also because I see this as the direction most drivers will be going in the relatively near future. The tools and skills needed for these cars are quite a bit different that those I use to work on my classic vehicles. There will be a bit of catch up required by the car repair industry to transition to this new reality. For us early adopters there will certainly be a level of frustration as that occurs when we try and get issues that arise resolved.

As far as my current issue goes, I did not proceed in a properly scientific method so I'm not sure what resolved my problem but it is resolved. I left the 12v system disconnected for about 36 hours while waiting for the OBD connector. After it arrived on Saturday, I reconnected the 12v battery, put the OBD scanner in and turned the key on. The "Limited Power Mode" turtle appeared. I powered up the OBD scanner but could not get it to connect to my phone via bluetooth. I turned the key off and on a couple times trying to connect and noticed the limited power mode was not coming on, just the service propulsion system yellow warning. I took the car for a short drive and it ran fine. After shutting it off and on, the service propulsion system warning was gone as well.

I wish I had tried turning the key off and on a few times without the scanner as I'm not sure what fixed the problem. I am currently charging up a Samsung tablet to see if that will connect the OBD scanner or if I got a non functioning one. I'll keep playing with it and let you know what I figure out.

Craig
 

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Having owned & fully seviced my own classic cars, I get your point, but any MODERN car has all the 500e computerization PLUS all the oil, belts, plugs, etc. of a classic.

It also appears that a 30-hour 12V disconnect & a few key-reboots is all it took to fix. No carbkit or new fuelpump or alternator or valve adjustment or ...

Thanks for the update, & please keep us posted on the OBD.
 

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Electric Tire Shredder

I'm glad you qualified your statement with "relative". The 500e is very simple when it is working but when it is not working it is far from simple and requires fairly advanced diagnostic tools to troubleshoot. While the old Volvo is a more complicated system the troubleshooting process is much more straightforward. I am a big car fan, I have 7 that I am currently insuring with a few project vehicles awaiting their turn. I bought the 500e because it made a lot of sense with my commute but also because I see this as the direction most drivers will be going in the relatively near future. The tools and skills needed for these cars are quite a bit different that those I use to work on my classic vehicles. There will be a bit of catch up required by the car repair industry to transition to this new reality. For us early adopters there will certainly be a level of frustration as that occurs when we try and get issues that arise resolved.

As far as my current issue goes, I did not proceed in a properly scientific method so I'm not sure what resolved my problem but it is resolved. I left the 12v system disconnected for about 36 hours while waiting for the OBD connector. After it arrived on Saturday, I reconnected the 12v battery, put the OBD scanner in and turned the key on. The "Limited Power Mode" turtle appeared. I powered up the OBD scanner but could not get it to connect to my phone via bluetooth. I turned the key off and on a couple times trying to connect and noticed the limited power mode was not coming on, just the service propulsion system yellow warning. I took the car for a short drive and it ran fine. After shutting it off and on, the service propulsion system warning was gone as well.

I wish I had tried turning the key off and on a few times without the scanner as I'm not sure what fixed the problem. I am currently charging up a Samsung tablet to see if that will connect the OBD scanner or if I got a non functioning one. I'll keep playing with it and let you know what I figure out.

Craig
Assume you got a kw902 type reader. They can be finicky to connect. On the one hand unlike other readers, you have to plug them in but ALSO turn them on, there should be a switch for that. Then I recommend pairing the bt from android’s settings, which tends to yield little or no confirmation of success. Then within alfaobd you should be able to see the adapter and connect via bt
 

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Discussion Starter #17
alels,

I did get the kw902. I can get it to pair but not connect. When I turn it on via the power button the other LEDs light up very briefly then go off. I'll play with the alfaOBD a bit more and see if I can get it to connect.

Electric Tire Shredder,

I should have qualified my statement in that I was referring to older, minimally computerized cars. My "new" car is a 2002 Ford F350 with 281,000 miles and my "old" car is a 1968 Volvo Amazon 122 (waiting on getting the turbo charged B230FT into it still). The 500e was a great leap into the future for me.

Craig
 

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Ya, me too: My "new" car was a 2000 Toyota MR2 Spyder whose engine was ruined by its own catalytic converters!* and my "old" car was a 1970 240z. That's why I mentioned carbkit, fuelpump, alternator & valve adjustment (although the latter became unnecessary after I installed a Ford 302).

Please let us know when & how you get OBD to work.

*stupidly located in exhaust manifold for ceramic vibration-destruction & valve-overlap engine entry
 

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Ya, me too: My "new" car was a 2000 Toyota MR2 Spyder whose engine was ruined by its own catalytic converters!* and my "old" car was a 1970 240z. That's why I mentioned carbkit, fuelpump, alternator & valve adjustment (although the latter became unnecessary after I installed a Ford 302).

Please let us know when & how you get OBD to work.

*stupidly located in exhaust manifold for ceramic vibration-destruction & valve-overlap engine entry
Cool! I always think about the MR2 s I tested before getting my Miata, what a monster turn in it has! Now that we have more practical cars I may look for a Spyder again
 
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