2012 BMW 335xi Automatic TransFACTORY OEM SERVICE PROCEDURE

System overview

The following illustration shows the system overview of the engine control system interfaces on the F10:

Fig 1: Engine Control System Communication Diagram
G09871655Courtesy of BMW OF NORTH AMERICA, INC.
Item Explanation
1 Dynamic stability control (DSC)
2 Digital engine electronics
3 Starter motor
4 Air conditioning compressor
5 Power distribution box, engine compartment
6 Junction Box Electronics (JBE)
7 Front fuse and relay module
8 fuel pump control module (EKPS)
9 Power distribution box, battery
10 Intelligent battery sensor (IBS)
11 Integrated chassis management (ICM)
12 Instrument panel (KOMBI)
13 Diagnostic socket
14 Car access system (CAS)
15 Central gateway module (ZGM)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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