Body Control Module: Description and Operation

Control Module, BCM (707)

Location
Control module, BCM (707)







Main task
- The exterior and interior lighting
- Direction indicators and hazard warning lights
- Central locking system
- Anti-theft alarm Time and date
- Gateway between the two galvanically separated I-buses.
- Comfort opening/Comfort closing

The BCM also has the task of gathering information from

- Parking brake switch
- Level sensor for coolant/brake fluid
- Outside temperature sensor
- Seat belt warning
- Switch, TCS/ESP
- Rheostat, instrument illumination
- Anti-theft alarm bonnet switch,

The BCM has a microprocessor with clock, RAM memory and a flashable ROM. An internal bus that interconnects the processor and memory with the I/O unit. The I/O unit answers for gathering values from the A/D converter for analogue inputs, digital inputs, bus and to activate the transistors in the power amplifiers.

Power supply, ground and bus communication







+30 is fed via the connector which is directly connected to the main fuse box.