Replacing control unit (DME) cylinders 5-8 (S63 B44 T 2) (X5 M)

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

Recycling

Catch and dispose of drained COOLANT .

Observe country-specific waste disposal regulations.

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.

Necessary preliminary tasks:

Switch off ignition.
Disconnect BATTERY NEGATIVE LEAD .
Remove POWER DISTRIBUTION BOX .
Follow INSTRUCTIONS for repair work on the cooling system.

IMPORTANT: Follow INSTRUCTIONS FOR REMOVING AND INSTALLING CONTROL UNITS .

Removal:

Unclip all cables from control unit holder.

Pull out control unit holder (1) slightly upwards until all connectors on control units are accessible.

Release and detach all connectors from control units at front (2) and rear (3).

Remove control unit holder (1) with the control units.

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Release clamp (1).

Remove control unit (DME) cylinders 5-8 (2).

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Installation:

Install control unit (DME) cylinders 5-8 (2) and fasten with clamp (1).

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Connect all connectors to control unit at front (2) and rear (3).

All connectors must audibly engage.

Install control unit holder (1) with control units.

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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 values are printed in two blocks of three digits on each injector.

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

Required follow-up work:

Install POWER DISTRIBUTION BOX .
Connect BATTERY EARTH LEAD .