Test sequence
- Switch off ignition.
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct current with multimeter between sockets [F.4] 100 and [F.17] 113 of the 126-pole socket box tester.
- Switch on ignition.
Specified value
- Amperage[15...20] mA
Question
- Is the measurement value OK?
YES
The measurement value is OK.Other possible cause of fault
- In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors for loose
contact and corrosion..
- B4/15 (Fuel pressure sensor)
End of test
NO
The measurement value is not OK.Possible cause and remedy
- Check lines to components N3/10 (ME-SFI [ME] control unit) and N118/3 (Left fuel pump control unit) as per wiring diagram.
Further possible remedies
- Read fault memories of the control units N118/3 (Left fuel pump control unit) and N3/10 (ME-SFI [ME] control unit).
2. Check power supply at control unit N118 (Fuel pump control module).
Possible cause and remedy
- Test fuse, replace if necessary
