IMPORTANT:
- Disconnecting the vehicle battery will cancel the fault memories of control units.
Consequently, before disconnecting the car's battery, always interrogate the fault memories. Investigate stored faults and, once any faults have been remedied, cancel the fault memory.
- Control unit plugs should only ever be connected and disconnected while the ignition is turned off.
- The removal and installation of components, relays, fuses etc. can cause faults to be stored in fault memories capable of self diagnosis. Always interrogate the fault memories after completing work on the electrical system.
- Investigate stored faults and, once any faults have been remedied, cancel the fault memory.
- If necessary, initialize power window regulator Initialize power window regulator
On replacement of the DME/DDE control unit note the following:
Comply with the diagnosis system instructions for the encoding and programming work operations.
On vehicles with an electronic immobiliser, comply with the diagnosis system instructions.
- If possible, bring the engine up to its operating temperature prior to replacement of the control unit.
- Change control units and drive the vehicle with changing engine speeds.
BMW X3 Owners Manual > Speed limit detection: Display
The following is displayed in the instrument
cluster:
Speed limit detection
Current speed limit.
Speed limit detection is not
available.
Speed limit detection can also be displayed in
the Head-up Display.
System limits
The system may not be fully functional and
may provide incorrect info ...