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Home >> BMW >> 2012 >> 335xi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Performance - Functional Description - E92 >> Engine Performance - Functional Description >> Automatic Engine Start-Stop Function (MSA) >> System overview
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System overview

The following system overview shows an example of the functional networking of the automatic engine start-stop function for vehicles with manual transmission and junction box electronics (JBE).

Fig 1: Electromagnetic Locking Unit - Circuit Diagram
G09871551Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Electronic Power Steering (EPS)
2 Dynamic stability control (DSC)
3 Engine compartment lid contact switch
4 Brake vacuum sensor
5 Digital engine electronics
6 Starter motor
7 Zero-gear sensor
8 Junction Box Electronics (JBE)
9 Fuse carrier, rear
10 DC/DC converter
11 Intelligent battery sensor
12 Battery
13 Power distribution box, battery
14 Seat belt buckle switch, driver's side
15 Instrument panel (KOMBI)
16 Clutch module
17 Integrated chassis management (ICM)
18 Steering column switch center (SZL)
19 Crash Safety Module (ACSM)
20 Automatic engine start-stop function button
21 Car access system (CAS)
22 Footwell module (FRM)
23 Door lock, driver's side
24 Central gateway module (ZGM)