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Home >> BMW >> 2013 >> M3 2D Convertible, Standard Trans >> Repair and Diagnosis (Single Page) >> General Information >> OEM General Information >> Functional Description -- M3 Convertible >> Body Electrical - Functional Description >> Fully Automatic Convertible Top >> System functions
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System functions

Fig 1: Car Access System - Circuit Diagram
G09895226Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Car Access System (CAS)
2 Footwell module (FRM)
3 Instrument cluster (KOMBI)
4 Centre console switch cluster
5 Control module for climate control
6 Junction box electronics (JBE)
7 Power distributor in junction box
8 Rear distribution box
9 Hall sensor 'convertible top cover locked'
10 Hydraulic unit
11 Convertible top module (CVM)
12 Switch for convertible top compartment floor
13 Hall sensor - open convertible top compartment lid
14 Hall sensor 'cowl panel locked'
15 Hall sensor 'tensioning bar extended'
16 Hall sensor 'tensioning bar set up'
17 Hall sensor 'tensioning bar stored'
18 Incremental transducer
19 Drive unit for locking cowl panel
20 Hall sensor 'main pillar set up'
21 Hall sensor 'main pillar stored'

The following system functions are described for the automatic convertible top: