Member Since: 26 Mar 2009
Location: Nottinghamshire
Posts: 1359
Operation Failed E 7
After fitting a new battery yesterday and then trying to reset the BMS I kept getting this error. Can anyone help please?
10th Sep 2020 4:27 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
Do you have one or two batteries on your D4?
10th Sep 2020 4:52 pm
SteveNorman
Member Since: 14 Oct 2005
Location: Somerset
Posts: 1146
Try disconnecting the battery, wait, reconnect, then try again
Regards Steve
10th Sep 2020 5:23 pm
nigel207
Member Since: 26 Mar 2009
Location: Nottinghamshire
Posts: 1359
Thank you.
We have two batteries (the usual stop/start arrangement), and I’ll give the disconnect/reconnect/retry a go.
11th Sep 2020 7:05 am
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
You may need to replace the other battery as well
11th Sep 2020 12:19 pm
nigel207
Member Since: 26 Mar 2009
Location: Nottinghamshire
Posts: 1359
Yes, I was wondering about that. I’m away at the moment, so will look when we get home.
11th Sep 2020 5:18 pm
nigel207
Member Since: 26 Mar 2009
Location: Nottinghamshire
Posts: 1359
I tried again - disconnected the battery etc., etc., and re-tried. Still got the same message.
I have now just replaced the auxiliary battery too and again tried to do the re-set, but again am getting the same message. The main battery was disconnected first (after letting the car go to sleep etc) before replacing the auxiliary one. Any ideas please?
26th Nov 2020 10:45 am
nigel207
Member Since: 26 Mar 2009
Location: Nottinghamshire
Posts: 1359
My mistake!! Of course it helps if you update the IID tool with the latest firmware!! All sorted.
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