Mercedes-Benz B250e with Tesla battery-Cells voltage too low

Topics concerning the Tesla front and rear drive unit drop-in board
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sokisoki3
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Joined: Sat Mar 01, 2025 8:51 pm

Mercedes-Benz B250e with Tesla battery-Cells voltage too low

Post by sokisoki3 »

hello to everybody
I got this mercedes in the workshop B250e with Tesla battery .
Fault codes
U1C03F1- HV battery control unit internal fault,
U1C61F1- Battery HV - Cell voltage too low,
U1C62F1- Battery HV Cell voltage too high .
Im using mercedes SD tool to diagnose it . Im looking to check every single cell voltage to trace the faulty cells in the pack . I cant see any data for single cells , checked BMS , checked power module and I cant find single cell live data . So my conclusion is : try connect directly to HV battery pack plug and connect with Scan my tesla or T-can pro .
Did any of you done something like that ? Can you share some info about it ? Any advice much appreciated . I attached some photos for reference
https://limewire.com/d/c34bc98a-7d23-47 ... K-KsrrzaSc

Ifound this way of sharing the photos . I couldnt work out your way . Sorry
Thank you Peter
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