General Module (GM)

The GM is responsible for the operation and central coordination of body electronics. The GM is a micro-computer that is the central component (heart) of the Central Body Electronics. The GM is located behind the glove box.

Fig 1: Identifying General Module Connections

Courtesy of BMW OF NORTH AMERICA, INC.

The GM communicates with other vehicle systems via the K-Bus. The GM is also the main controller (master) of the P-Bus. Other functions of the GM include the processing of inputs from sensors and switches as well as controlling various output stage transistors to operate relays and other control circuits.