Engine Control Module: Service and Repair

12 14 550 - Replacing control unit (DME)





Necessary preliminary tasks:
- Switch off ignition
- Disconnect battery 61 20 900 Disconnecting and Connecting Battery Negative Lead
- Remove microfilter housing 64 31 092 Removing and Installing/Replacing Microfilter Housing (Lower Section)

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





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





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.





Unlock fasteners (1) from below and slide upwards approx. 10 mm.
Unlock locks (2) in direction of arrow.
Remove cover (3).





Unlock plug (1) and remove.
Release grommet (2) from electronics box.

Installation:
Make sure grommet (2) is correctly seated in housing (watertightness).
Unlock control unit (3) and raise slightly.





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

Installation:
Replacement:
Note device identification number and coding.





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