12 14 550 Replacing Control Units (Digital Motor Electronics N73)

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Necessary Preliminary Tasks:

Read fault memory.
Switch off ignition.
Follow instructions for disconnecting and connecting battery. Refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Disconnect battery.
Remove right fresh air duct. Refer to 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH) .

CAUTION:

Observe removal and installation of electronic control units. Refer to 12 00 ... INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS .
Observe following instructions before replacing control unit:
Program control unit. Refer to 12 14 705 PROGRAMMING CONTROL UNIT (DME/DDE) .
Code control unit.

Release screw and remove holder (1).

Release screws and remove cover (2) from control unit box.

NOTE: Release screws on seal (3) only when removing wiring harness.

Fig 1: Removing Cover From Control Unit Box

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Insert tabs (1) in openings (2) and close cover.

Fig 2: Identifying Tabs In Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach plug connections on DME control unit (3).

Installation:

Plug color: black.

Unlock and disconnect plug-in connections on DME 2 control unit (2).

Installation:

Plug color: gray.

Fig 3: Disconnecting Plug-In Connections On DME Control Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Add final details to vehicle.

Check function of DME.