11 37 700 Replacing control unit (Valvetronic)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2005 BMW 745i, 2005 BMW 745Li, 2004 BMW 745i, 2004 BMW 745Li, and 2003 BMW 745i. However, it is still accessible from the selected car via links, so may be relevant.
Switch off ignition.
Follow instructions for disconnecting and connecting battery. Refer to 12 00... Instructions for disconnecting and connecting battery .
Disconnect battery.
CAUTION:
Follow instructions for removing and installing 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) .
Remove right fresh air duct. Refer to 64 31 056 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRESH-AIR DUCT (AUTOMATIC A/C HIGH) .
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.
Installation:
Insert tabs (1) in openings (2) and close cover.
Unlock and detach plug connections on Valvetronic control unit (1).
Remove Valvetronic control unit (1).
NOTE:
Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Then clear fault memory.
Check stored fault messages.
Rectify faults.
Then clear fault memory.