MSA and power management

The MSA is strongly networked with the power management. When the battery is replaced, a terminal is disconnected or the engine control is programmed, the reference data for battery charge status may be lost. The data will only be available once again following a standby (parasitic) current measurement lasting roughly 6 hours (for instance, overnight standby current measurement without a charger connected) with no vehicle wake-up during this period. In this time, the MSA is inactive. The customer must be notified of this when the vehicle is handed over. The MSA switches back automatically to active as soon as the necessary routine have been completed successfully.