38
E88 Complete Vehicle
The following control modules also contribute to the operation of the convertible top:
• Instrument cluster (KOMBI)
The instrument cluster supplies an outside temperature reading (bus signal) and indi-
cates the Check Control messages regarding the convertible top using Check Control
symbols.
• Footwell module (FRM)
The footwell module (FRM) controls the front power windows. To open the convertible
top, the side windows must be opened (bus signal from the CVM).
• Junction box electronics (JBE)
The junction box electronics (JBE) control the rear power windows. To open the convert-
ible top, the side windows must be opened (bus signal from the CVM).
The junction box electronics supply a signal to indicate whether the trunk lid is closed
(bus signal).
The distribution box in the junction box supplies the convertible top module (CVM) via
terminal 30g.
The CVM is supplied via terminal 15 of the Car Access System (CAS). If, for example, the
junction box power supply is interrupted, sufficient communication is still possible with
the BMW diagnostic system.
• Car Access System (CAS)
The CAS stores the power window position or status and makes that information avail-
able to the CVM control module.
Following a request from the CVM, the CAS controls the opening and closing of the side
windows. The CAS prevents the trunk lid from opening and any movement of the power
windows when the convertible top is in an intermediate position.
The Car Access System (CAS) controls comfort opening of the convertible top.
The signals
from
the remote control are received by the FBD receiver and passed on to
the CAS.
Comfort opening and comfort closing are controlled via the lock and key in the driver’s
door:
The CAS receives this signal from the footwell module (FRM).
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