BMW E Series Injector Adjustment Calibration
Scanner required for this tutorial: Vedis II or iScan-II wt
Vehicle used for this tutorial: BMW E92 (N54 engine)
When the injectors are manufactured, a multitude of measurement data is recorded at specific points in the factory. Information on the lift performance of the injector is also added for injector voltage adjustment. Injector adjustment is required because of the individual voltage demand of each piezo actuator. An allocation is made to a voltage demand category, which is included in the number combination on the injector.
These data items are transmitted to the ECM. During engine operation, these values are used to compensate for deviations in the metering and switching performance. Available engine type for Injector Adjustment :
- Petrol Engine: N20,N53,N54,N55
- Diesel Engine: N43,M47,M57,N47,N57
When to perform Injector Adjustment:
- The DME ecu is replaced
- Any fuel injectors are replaced
Example of tolerance range number:
Tolerance range numbers of N54 Engine, the tolerance ranges for injector-quantity adjustment are determined and specified in two three-digit number combination.
Tolerance range numbers of N55 Engine, the tolerance ranges for injector-quantity adjustment are determined and specified in a three-digit number combination.
Tolerance range numbers of N47/N57 Engine, the tolerance ranges for injector-quantity adjustment are determined and specified in a seven-digit number combination.
1 Select Vehicle Diagnostic → EUROPEAN
2 Select BMW PKG → BMW DIAG
3 Select BMW E Series
4. Select 77 Equipment Function Setup –> Drive
5 Select Injector rate adjustment → E90/E91/E92/E93
6 Select Automatic select engine type → N54
7 Select No due to we only replaced injector for this test
8 Read calibration values from each cylinder and select: 1 Enter new calibration values to input new values
9 Select Cylinder 6 and Enter new calibration value
10 Press ENTER to save new values. Turn ignition off and wait 10 sec, then turn ignition on.
11 The calibration values are saved permanently.
This tutorial is a courtesy of Autoland Scientech.