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E90 General Vehicle Electrical
The components installed with the interior lighting system for the E90 are:
• Interior Light with Interior Light Switch
• Interior Light with Interior Light Switch
• Reading Light with Reading Light Button, Driver and Passenger
• Top Light, Driver and Passenger
• Interior Light
• Interior Light with Interior Light Switch
• Reading Light with Reading Light Button, Driver and Passenger
• Top Light, Driver and Passenger
• Luggage Compartment Light
• Vanity Mirror Light, Driver and Passenger
• Footwell Lights, Driver and Passenger
• Courtesy Light, Driver and Passenger
Control Modules for Interior Lighting
The "interior lighting" function is distributed over several control module that communi-
cate with each other via the K-CAN.
• Footwell Module (FRM) is responsible for switching the interior lighting on & off.
• Roof Functions Center (FZD) is responsible for the interior lighting components in
the roof area.
• Junction Box Electronics Control Module (JBE) is the interface to the luggage &
glove compartment lighting.
• Car Access System 2 (CAS2) receives the unlock signal and sends the instructions
through the footwell module to switch on the interior lighting.
The interaction of these three control units is described in more detail on the following
pages.
Interior Lighting
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