User Manual

55
BMS
The BMS (Battery Management System) allows the scan tool to evaluate the
battery charge state, monitor the close-circuit current, register the battery
replacement, activate the rest state of the vehicle, and charge the battery via
the diagnostic socket.
The vehicle may use either a sealed lead-acid battery or an AGM (Absorbed
Glass Mat) battery. Lead-acid battery contains liquid sulphuric acid and may
spill when overturned. AGM battery (known as VRLA battery, valve
regulated lead-acid) also contains sulphuric acid, but the acid is contained in
glass mats between terminal plates.
It is recommended that a replacement aftermarket battery has the same
specifications, such as capacity and type, of the battery used in the vehicle.
If the original battery is replaced with a different type of battery (e.g. a
lead-acid battery is replaced with an AGM battery) or a battery with a
different capacity (mAh), the vehicle may require reprogramming the new
battery type in addition to performing the battery reset. Consult the vehicle
manual for additional vehicle-specific information.
Battery
The Battery function allows the scan tool to evaluate the state of the battery
charge and register the battery replacement.
Take BMW as an example:
1) Select BMS icon on the Service screen (Figure 5-1), choose BMW from
the vehicle make screen and select the correct vehicle model to enter
the Power supply (Battery) menu.