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E90 General Vehicle Electrical
To get a better understanding of the concept of “distributed functions” using the Central
Locking System as an example.
To date (E46), the "Central Locking" function was located primarily in the General Module
(GM) or, on the E60 in the Basic Body Module (KBM) and the door modules.
The "Central Locking" function in the E90 is distributed over several control modules
(Car Access System, Junction Box Electronics Control Module & Footwell Module).
Distributing functions over several control module offers the advantage that sensors and
actuators are connected directly to a control module in the vicinity of their installed loca-
tion, which result is shorter cable connections. By interlinking the control modules, it is
possible to exchange sensor data between them.
The primary control modules for the systems in the E90 are:
• Junction Box Electronics Control Module (JBE)
• Car Access 2 (CAS2)
• Footwell Module (FRM)
• Roof Function Center (FZD)
The distributed functions concept is used/identified in the
following General Vehicle Electrical Systems:
• Central Locking (ZV))
• Comfort Access (CA)
• Interior Lighting (IB)
• Power Windows (FH)
• Slide/tilt Sunroof (SHD)
• Anti-theft Alarm System (DWA)
• Electronic Steering Lock (ELV)
• Wiper Washer System
• Park Distance Control (PDC)
• Vehicle Exterior Lighting
• Adaptive Headlight Control
• Steering Column Switch Cluster (SZL)
• Outside Mirror
• Power Seats
• Rear Sun Shade
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