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sceh
Member Since: 14 Sep 2011
Location: annecy
Posts: 233
  
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| Battery charge percentage |
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Anyone know how the tool calculates this? I have 12.6 volts and 85% but sometimes with 12.45 I have 98%
I know it is an estimate but it seems a bit awry
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 16th Feb 2022 8:12 pm |
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sceh
Member Since: 14 Sep 2011
Location: annecy
Posts: 233
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and last night it said 85% and this morning 92%..
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| 17th Feb 2022 1:01 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
  
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well it monitors current in and out the battery terminal
And when you reset it / tell it it's had a new battery, it must assume its 100% I guess ?
Maybe that is what you should do if you have a problem.
Disconnect battery. Charge battery overnight.
Connect up and use IID to say it's had a new battery
Infact you don't need to disconnect it really. Just charge direct onto battery terminals
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| 17th Feb 2022 1:34 pm |
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sceh
Member Since: 14 Sep 2011
Location: annecy
Posts: 233
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I did all that and ended up at the beginning of this string..
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| 17th Feb 2022 2:31 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
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What problem are you having again ?
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| 17th Feb 2022 2:58 pm |
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sceh
Member Since: 14 Sep 2011
Location: annecy
Posts: 233
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All the warning lights come on starting with HDC and then all the others, lowered suspension, limp, gearbox fault etc etc. I changed the battery for a new one and I am not sure if the battery is good or not
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| 17th Feb 2022 6:41 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12697
 
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Another spin-off thread?
I've lost track of what testing you've done and what results you got. .
Dean
====================================
2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer  ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
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| 17th Feb 2022 7:05 pm |
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Yankee_Rover
Member Since: 02 Jun 2021
Location: Seattle
Posts: 183
  
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The IID tool regularly reports battery voltage ~.3v lower than actual on my vehicle (checked with DMM on the battery terminals). This is perhaps due to voltage drop, could also be how the voltage is read.
Get yourself a digital multimeter and remove all doubt. Handy tool for much more than just checking battery charge, too. 2008 LR3 HSE, 4.4L V8
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| 17th Feb 2022 7:41 pm |
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sceh
Member Since: 14 Sep 2011
Location: annecy
Posts: 233
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Another spin-off thread?
I've lost track of what testing you've done and what results you got.
No, sorry. This thread was just to ask a specific question about the tool which would have ben lost in the original thread (s)
All the voltages I measure are with a digital multimeter btw
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| 18th Feb 2022 9:28 am |
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