BDC Body Domain Controller

The Body Domain Controller (BDC) controls the interior lighting as well as the external lights. In the event of an accident with the corresponding severity, the interior lighting and hazard warning lights switch on automatically.

The Body Domain Controller (BDC) supplies input signals with information on the terminal voltage (for instance, Terminal 15 wake-up line). The Body Domain Controller (BDC) supplies voltage to the Crash Safety Module (ACSM) (starting when power at Terminal 30B is switched on).

The Body Domain Controller (BDC) represents a new generation superseding existing control units and their functions. For example, the Body Domain Controller (BCD) safeguards functions from the following former control units:

• FRM: Footwell module
• CAS: Car Access System
• JBE: Junction Box Electronics
• ZGM: Central gateway module

The central gateway module (ZGM) is integrated into the Body Domain Controller (BDC). The central gateway module (ZGM) is seen as a control unit within the control unit, as the central gateway module (ZGM) acts as a self-sufficient control unit within the Body Domain Controller (BDC).

The Central Gateway Module (ZGM) links all main buses to one another. Examples of a main bus include the FlexRay, MOST, PT-CAN and K-CAN. The central gateway module's (ZGM) gateway function thus supports data exchanges amongst the various bus systems.

If the diagnosis system is connected through the D-CAN (Diagnosis-on CAN), the central gateway module (ZGM) transfers the queries from the diagnosis system to the internal buses. The response telegrams run through the process in the opposite direction.