BMW X3 Service & Repair Manual: Replacing control unit (dme) (N20, N26)

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection)

Necessary preliminary tasks:

  • Switch off ignition.
  • Disconnect BATTERY NEGATIVE LEAD .
  • Remove ACOUSTIC COVER

IMPORTANT: Follow INSTRUCTIONS for removing and installing control units

Replacement:

  • Carry out programming/encoding
  • If no data can be read out from the previous control unit, carry out injection quantity compensation (description at end of instructions).

IMPORTANT: It is absolutely essential to read out the fault memory with the BMW diagnosis system and to create a fault memory printout.

Switch off ignition.

Unlock and pull off all connectors (1) from the DME control unit (2).

Release screws.

Remove DME control unit.

Electrical

Injection quantity compensation:

If the DME control unit has been replaced, it will also be necessary to carry out adjustment of the injectors! Injection quantity compensation is carried out with the aid of so-called adjustment values.

The adjustment value is printed on each injector in three digits.

The adjustment values must be stored in the new control unit! If injector quantity compensation is not carried out, the engine may run roughly or fail to start.

Read off the adjustment values and enter according to the installation location (cylinder) of the injectors:

  • Connect BMW diagnosis system
  • Identify vehicle
  • Select "Function selection"
  • Select "Service functions"

Electrical

  • Select "Engine electronics"
  • Select "Adjustment function"
  • Select "Adjust injectors"
  • Select "Test plan"
  • The adjustment value must be entered for each cylinder.

NOTE: Check stored fault message.

Delete fault memory.

    Replacing (dde) control unit (N47 D20 O1)
    IMPORTANT: Read and comply with NOTES on protection against electrostatic damage (ESD protection). Necessary preliminary work: Read out t ...

    Replacing control unit (dme) (N52T)
    IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) Necessary preliminary work: Switch ...

    Other materials:

    BMW X3 Service & Repair Manual > Propeller shaft: Spindle
    Spindle AM NOTE: (Spindle with rotary handle) NOTE: With synchronising key, transmission: All WASHER Washer Mechanical tool Replaced by: 83300491818 NOTE: (Extraction washer) For the constant velocity joint on the propeller shaft. Replaced by 26 1 110. (0 491 818) ...

    BMW X3 Owners Manual

    BMW X3 Service & Repair Manual

    © 2017-2024 Copyright www.bmwx3tech.com - 0.0099