Power management

The integrated supply module provides the power supply to the DME control unit.

3 relays in the integrated supply module distribute terminal 87 (power supply) to the various components.

For memory functions, the DME control unit also requires an uninterrupted power supply via terminal 30. Terminal 30 also supplies power to the integrated supply module.

The earth connection for the DME control unit is provided by several pins which are connected inside the control unit.

Power management includes the following functions:

Closed-circuit current monitoring
Consumer shutdown
Control of the alternator
Battery voltage monitoring

The battery voltage is regularly monitored by the DME control unit. If the battery voltage falls below approx. 6 volts or exceeds 24 volts, a fault is registered.

Diagnosis become active 3 minutes after the engine has started. This ensures that the effects of the starting operation or starting assistance on the battery voltage will not be registered as a fault.

E60, E61, E63, E64

The intelligent battery sensor (IBS) monitors the battery. The intelligent battery sensor is connected to the bitserial data interface (BSD).

The fuse box supplies power to the DME control unit via the front power distributor in the junction box (for terminal 30 and terminal 87).

The intelligent battery sensor (IBS) monitors the battery.