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Discussion Starter · #1 ·
Hi. Couldn’t find anything about this so hope it isn’t repetitive. Lately my car won’t take a full charge and also displays the warning ! Light with the turtle icon quite regularly. After the last few days I have struggled to get more than a few bars charge. I went to charge again a moment ago and the red charging light doesn’t display and the charging event doesn’t start. It is concerning and I’m not sure what the next step is. I’m due to take the car for some recall work and MOT on Monday but it is about 4 miles away. Not sure it will survive the trip on the charge it has. Does anyone have an idea what the problem could be, or know of any London based mobile mechanics that specialise in EVs? I am an AA member but not sure they would be able to do much. Thanks
 

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Hi. Couldn’t find anything about this so hope it isn’t repetitive. Lately my car won’t take a full charge and also displays the warning ! Light with the turtle icon quite regularly. After the last few days I have struggled to get more than a few bars charge. I went to charge again a moment ago and the red charging light doesn’t display and the charging event doesn’t start. It is concerning and I’m not sure what the next step is. I’m due to take the car for some recall work and MOT on Monday but it is about 4 miles away. Not sure it will survive the trip on the charge it has. Does anyone have an idea what the problem could be, or know of any London based mobile mechanics that specialise in EVs? I am an AA member but not sure they would be able to do much. Thanks
You might want to try and hard reset of the many computers by shutting down the car, waiting 10 minutes with the bonnet latch opened and then disconnecting / reconnecting the 12v battery negative lead.
 

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The warning light could mean many different things. You really need to get the fault codes read to have any idea what is going on. Otherwise you're flailing around in the dark.

As it's an i-Miev that means using a MUT-III, although Hobdrive and iCarsoft i909 can both apparently read fault codes as well.

There are a number of frequently emerging faults on these cars now but without fault codes its hard to speculate which particular problem your car has!

Another thing that might be worth checking is checking cell voltage balance using Hobdrive or Canion. If there is a (very) large balance error, such as that caused by a faulty cell or faulty LTC chip in a CMU module the car will refuse to charge.
 

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Hi, those symptoms point to a weak cell - turle is coming in because a cell is hitting the low voltage state which triggers turle and the charge is stopping because the cells are too far out of balance for the standard balancing to bring them back in line. Basically the car charges and then pauses to balance the cells (bring them all up to the same voltage). If they come within a specific voltage (min to max difference) then it carries on charging. I've replaced a cell in an i-miev recently, just doing test runs at the moment to make sure all is good. The cell wasnt quite the same voltage when I swapped it in and i'm cycling the pack from flat to full to balance it out, after that it should accept a full charge and all be good.

I'm based in essex if you want further advice - I don't really work on people's cars, I usually just work on my own cars or buy ones that have issues to fix, but im happy to give you advice etc.

Cheers.
 

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Discussion Starter · #7 ·
Hi, those symptoms point to a weak cell - turle is coming in because a cell is hitting the low voltage state which triggers turle and the charge is stopping because the cells are too far out of balance for the standard balancing to bring them back in line. Basically the car charges and then pauses to balance the cells (bring them all up to the same voltage). If they come within a specific voltage (min to max difference) then it carries on charging. I've replaced a cell in an i-miev recently, just doing test runs at the moment to make sure all is good. The cell wasnt quite the same voltage when I swapped it in and i'm cycling the pack from flat to full to balance it out, after that it should accept a full charge and all be good.

I'm based in essex if you want further advice - I don't really work on people's cars, I usually just work on my own cars or buy ones that have issues to fix, but im happy to give you advice etc.

Cheers.
Really useful info. I’m not that confident poking around under there. Thinking I may need to call someone out with expertise. It’s just a shame I can’t get a full charge as I’m taking it to a dealer to get some recall issues looked at and thought they may be able to sort any other issues too. I’ll try another charge tomorrow and if it doesn’t work I’ll call someone out. Thanks everyone. Just good to get an idea of what the problem is and whether it’s fixable.
 

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Have you checked if the battery is still in warranty ?

I don't know about the i-Miev but the Ion/C-Zero had an 8 year 60k mile extended battery warranty, subject to the yearly service being performed.

Unfortunately there is no specified SoH cut off for the warranty like there is for some other EV's so you'd probably need a near failure of the battery or a failure of it to charge (which you seem to do) before they would consider honouring the warranty.

What age and mileage is the car?
 

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Just prior to the car showing the behaviour you described in your first post, what indicated mileage were you getting on the GOM after a full charge, and would the car actually cover that distance before entering turtle mode?
 

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Now that I've quoted the correct bit, I'll ask again: What's that about?
Sorry, what's your point. I've suggested something which should be within the capability of any owner as a first step, doesn't require any diagnostic equipment etc. There is some unusual behaviour here, no warning lights etc.
Cheers.
 

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I don't understand what you don't understand. You said there's something magical about waiting 10 minutes with the bonnet open that will "hard reset" ECUs.

Now, I've never heard this before, but every day's a school day. Can you tell us more?
 

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Discussion Starter · #13 ·
Have you checked if the battery is still in warranty ?

I don't know about the i-Miev but the Ion/C-Zero had an 8 year 60k mile extended battery warranty, subject to the yearly service being performed.

Unfortunately there is no specified SoH cut off for the warranty like there is for some other EV's so you'd probably need a near failure of the battery or a failure of it to charge (which you seem to do) before they would consider honouring the warranty.

What age and mileage is the car?
2009 car. Not sure of mileage without checking.
 

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I don't understand what you don't understand. You said there's something magical about waiting 10 minutes with the bonnet open that will "hard reset" ECUs.

Now, I've never heard this before, but every day's a school day. Can you tell us more?
Yeah, everyday is a schoolday for all of us.
Didn't use the term magical.
Suggest OP switch off the car, wait 10 minutes and disconnect the 12v auxiliary battery which powers the EV-EVU, the computer master brain of the car. A reset of this computer might just get this car charging for a bit, enough for the OP to cover his 4 mile trip to a garage hopefully with enough expertise to dig deeper.

As you and I know, the bonnet has to be open to access the 12v auxiliary battery.
 

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Unlatched. That's when you pull the interior bonnet release handle so it pops up and can be opened from outside the car😜
 
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