Power Module - Overview: Overview BMW 7 series E65/E66 facelift

Model: E65, E66

Production: All

The Power Module (PM) is one of the innovative new developments on the E65. 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.

Scheme 284

The PM functions include

1. Optimum charging
2. Load-circuit peak reduction
3. Shut-down of auxiliary consumer circuits in the event of low voltage
4. Closed circuit current monitoring
5. Distribution mode
6. Automatic electrical system isolation
7. Load cutout
8. Electronic fuses
9. Central battery voltage notification
10. Rear window defogger output
11. Interior lighting control
12. Trunk lid and fuel filler flap control
13. Data memory storage
14. Emergency-mode functions
15. Check Control messages
16. Diagnosis