Injection quantity compensation

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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!

Fig 1: Identifying Injectors Injection Quantity Adjustment Values

Courtesy of BMW OF NORTH AMERICA, INC.

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:

Fig 2: Identifying Injectors Injection Quantity Adjustment Values

Courtesy of BMW OF NORTH AMERICA, INC.

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.

NOTE: Check stored fault message.

Clear diagnostic fault entries from fault memory.

Vent COOLING SYSTEM for intercooler.