Is it a critcal fault?
car jumping on two floor's out of 7.
Mean does it shut it down?
works normal.
What did you do to rectify the problem. When it faults will the car run on car calls?
when we face problem in we spend days for rectifying . on manual methods step by step checks all points and if any problem we think is here than we physically bypass the points .and find the area where the problem occurs .

Does it answer hall calls?
working normal on normal calls but jumping on some status gives error b1a....