2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 30

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