Preparation For Test

Figure 1:

N3/4 Engine control module (HFM-SFI)
048 Self-made harness
050 Socket box (126-pole)
055 Measuring glass
088 Test cable

1. Connect socket box to engine control module (N3/4).
2. Unplug 2-pole connectors on injectors.
3. Remove fuel rail with injectors, thereby not disconnecting the fuel feed and return lines.
4. Connect self-made harness (048) one after another to each injector.
5. Hold each injector one after another in measuring glass.

Tools and Equipment:

Self Made Tool




Connector layout
Position 1 = red
position 2 = brown

Test harness consisting of:
1x Connector 140 545 35 28
2X Contact spring 004 545 56 26
1x Banana plug (red)
1x Banana plug (black)
2.2 m Wire (red, 1.5 mm dia.)
2.2 m Wire (brown, 1.5 mm dia.)
2 m Harness tubing (6 mm dia.)