Module Charge Balance: Description
WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
If a malfunction such as abnormal voltage occurs with a cell of the Li-ion battery, replace the module containing the malfunctioning cell. When replacing the module, calculate the adjustment voltage value from the maximum cell voltage of other normal cells and adjust the replacement module to that adjustment voltage value.