Purpose of the System

Purpose of the System

The Power Module (PM) is one of the innovative new developments on the E65/E66. The job of the Power Module is to ensure that the battery charge level is maintained when the engine is running and when the vehicle is at rest. The Power Module is also responsible for maintaining the power supply (in the event of faults in the electrical system) to important vehicle systems by disconnecting lower priority circuits.

Power Module Functions

- Optimum charging.
- Load-circuit peak reduction.
- Shut-down of auxiliary consumer circuits in the event of low voltage.
- Closed circuit current monitoring.
- Distribution mode.
- Automatic electrical system isolation.
- Load cutout.
- Electronic fuses.
- Central battery voltage notification.
- Rear window defogger output.
- Interior lighting control.
- Trunk lid and fuel filler flap control.
- Data memory storage.
- Emergency-mode functions.
- Check Control messages.
- Diagnosis.