pre-charged and balanced the cells. Detected chip is BQ9000 with manufacturer name Panasonic.
reset says unknown firmware. tried to reset using bq9000 but failed.
help needed to unlock the chip
Have you checked the fuse ?..
Have you checked the fuse ?..
yes, fuse already soldered
The dump seems not locked so there might be a problem with the PCB.
Has the baterry been recelled once already? Because the dump has been definitely reprogrammed before.
Or someone has just changed FCC, cycles & date?
Is it a customer battery or coming from a supplier?
Anyway try the dump and post updated screenshot.
Has the baterry been recelled once already? Because the dump has been definitely reprogrammed before.
Or someone has just changed FCC, cycles & date?
cells are not replaced, seems original. but I am sure has been reprogrammed already.
Is it a customer battery or coming from a supplier?
it is customer battery already repaired because fuse is not present, only soldered the points.
Anyway try the dump and post updated screenshot.
no change after writing the dump. still locked.
what should be checked in PCB further?
Have you checked the fuse ?..
yes, fuse already soldered
Why didn't you mention here that fuse was not present at all? This could save us a lot of time and effort guessing and diagnosing faults? The firmware is checking the fuse control circuit and if not present it will not start.
fuse is not present, only soldered the points.
Post a photo.
Why didn't you mention here that fuse was not present at all? This could save us a lot of time and effort guessing and diagnosing faults? The firmware is checking the fuse control circuit and if not present it will not start.
sorry for not clearing but I did not say recovered, thought soldered will clear the point. 
yes, fuse already soldered
Post a photo.
So install a normal working fuse and the problem should be solved.
Will update after installing, thanks.
removed the solder to install fuse. but only 3 pins are there on the PCB.
is it ok to let 4th pin of fuse with no connection? 3 legged fuse will not fit here.
Use only IN, OUT and CONTROL pins.
Use only IN, OUT and CONTROL pins.
found 3 pin fuse in one old pcb. installed and recovered it but same result.
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