Engine Control Module: Service and Repair

12 14 550 - Replacing control unit (DME)





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge)





Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery negative lead 61 20 900 Disconnecting and Connecting Battery Negative Lead
- Remove microfilter housing 64 31 081 Removing and Installing/Replacing Microfilter Housing

Important!
Follow instructions for removing and installing control units Service and Repair





Replacement:
- Carry out programming/coding Programming and Relearning





Important!
It is absolutely essential to read out the fault memory with the MoDiC or the BMW DIS and to create a fault memory printout.

Switch off ignition.





Lever out expander rivet.
Remove gasket (1).
Release screws (2).
Feed out partition (3) and remove.





Lever out expander rivet.
Release locks in direction of arrow.
Feed out fresh air duct (1) and remove.





Open retainers.
Release lock (1) in direction of arrow.
Remove cover (2).





Release screws and remove retaining bar (1).
Unlock upper section (2) of partition seal in direction of arrow and remove.
Release grommets (3) for wiring harnesses from lower section of partition seal and from electronics box.

Installation Note:
Make sure grommets are correctly seated (watertightness).





Unlock plugs (1) using slide in direction of arrow and remove.
Remove control unit (2).

Installation Note:
Replacement:
Note device identification number and coding.





Note:
Check stored fault messages.
Now clear the fault memory.