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by vh2q
Wed Feb 26, 2020 7:52 am
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

That is helpful thanks.

What tools do I need to pull the pack? Am on the proverbial desert island here. Instructions?
by vh2q
Tue Feb 25, 2020 12:16 pm
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

For what it's worth, I ran battery down to 0 bars and when the turtle came on the bad cell was down to 3.48V, the rest were still at 4.0V. So it seems that the bmu software sets the charge gauge based on the weakest cell, but controls the charger based on the strongest cell. After two charging cycle...
by vh2q
Sun Feb 23, 2020 11:14 am
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

I didn't mention it earlier but I got these two errors when I first scanned car: P1AE6 EEPROM error P1A51 EEPROM abnormal I cleared them and they did not come back. The other two errors cannot be cleared P1A4B cell voltage abnormal P1A2F cell error And this all happened after aux battery was out of ...
by vh2q
Sun Feb 23, 2020 8:33 am
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

So the problem is the weak cell gets down to 3V pretty quick and the computer then shuts down the car to protect it? Can one short out the bad cell?
by vh2q
Sat Feb 22, 2020 3:13 pm
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

Car is in Bahamas .. still don't get why one weak cell will suddenly prevent pack from charging more than 25% though.
by vh2q
Sat Feb 22, 2020 11:18 am
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

Well fast fforward a month, I got set up with hobdrive and took a look at the ECU data. Getting two error codes P1A4B (cell voltage abnormal) and P1A2F (cell error). Charged car up to 3 bars, which is all it will take, and read. voltages. All around 4.1V except one cell is 3.79V. TrIed to actuate sm...
by vh2q
Fri Feb 21, 2020 3:12 pm
Forum: General / Main Owners Forum
Topic: hobdrive - and i-MIEV ion zero, show electronic control units, reset errors
Replies: 154
Views: 77739

Re: hobdrayv - and i-MIEV ion zero, show electronic control units, reset errors

Got this thing to work, using ONE Link LX, had to download new vehicle profiles to find imiev, and it's really hard to read some of the screens. Does anyone know how to reset the battery management unit end pointa?
by vh2q
Wed Jan 08, 2020 1:21 pm
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

I do have an Android phone. Where do I get the other gizmo? I bought a code scanner a few years ago but it never produced anything intelligible.

Car charged up to 15 miles/3 bars again today, no real gain vs. Yesterday.
by vh2q
Mon Jan 06, 2020 10:18 am
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

Another small improvement today. But I have a theory: when I put car in storage and disconnected aux, ECU memory saved status as 2.5 bars of charge needed. This is about consistent with my recall. Meanwhile, main self discharges to almost zero over the year plus it was sitting. So now when I wake it...
by vh2q
Sun Jan 05, 2020 5:45 pm
Forum: Batteries and Battery Management
Topic: Fuel gauge vs tortoise
Replies: 33
Views: 13800

Re: Fuel gauge vs tortoise

Yesterday, starting out at 3 bars (actually 2 and a partial which is all the juice it would take) I drove 10 miles and the bars went to zero with one mile of range showing but no tortoise. Today, again starting with 3 bars showing, I did the same 10 miles returning with about a half bar and range of...

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