Shut Down Protocol

Shut Down Protocol

Shut-Down of Consumer Circuits (Sleep mode)
To prevent battery discharge by consumer items mistakenly left on, the interior lighting circuit (IB) and consumer circuits-roof zone (VA-D) are shut off 16 minutes after KL R is switched off.

The consumer circuit-body (VA-K) remains on longer for the cigarette lighter relay, glovebox lighting, luggage compartment light and the telephone (recharging if plugged in). The VA-K is shut off 60 minutes after KL R is switched off.

Shut-Down of Auxiliary Consumers
In order to ensure that the car is capable of starting, the charge level (SOC-State of Charge) of the battery is monitored when the vehicle is at rest. The minimum battery SOC required to ensure that the car can be started again is a calculated value.

The calculation takes into account the:
- Battery temperature measured over last few days
- Engine type
- Capacity of the battery fitted (110Ah for the 745i).

The SOC calculation is displayed as a percentage of battery capacity (a fully charged battery is considered 80%). If the charge level of the battery gets close to that calculated minimum level as a result of the operation of an auxiliary consumer unit, the Power Module instructs that circuit to switch off.

Auxiliary consumer circuits are items such as the Control Display, DWA, LM, EGS and IHKA (rest function). There are two modes of operation when shutting down auxiliary consumer circuits: auxiliary consumers with KL R "ON" and auxiliary consumer with ignition off (KL 0).