Auxiliary Consumers And Terminal R

When terminal 15 changes to terminal R, the message Priority level 1 is broadcast. Reduction of power consumption if necessary is then controlled on the basis of the table (LOAD-CIRCUIT PEAK REDUCTION CHART  and PRIORITY TABLE FOR LOAD-CIRCUIT PEAK REDUCTION AND SHUT-DOWN MODES  ) .

The charge level of the battery is calculated. If it is still below the minimum level for starting the car, the following Check Control message appears:

Fig 1: Auxiliary Consumers And Terminal R Control Message

Courtesy of BMW OF NORTH AMERICA, INC.

If the charge level does not improve, after 5 minutes the PM issues the "Shutdown counter" message (shut-down message is to inform modules to store any information prior to power being switched off). After a further 90 seconds, the vehicle's electrical system is shut down.

This is on condition that no safety related consumers are switched on.

If safety related consumers are on (e.g. hazard lights), the battery is not disconnected from the electrical system when the minimum battery SoC for starting the car is reached. The battery is allowed to fully discharge.