2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 33

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

-

Question

- Is fuse OK?

YES

Test prerequisite

Test sequence

- Switch on ignition.

- Unplug 4-pin connector from component N118 (Fuel pump control module).

- Measure voltage at the unclipped cable.(Ground- Positive)

- Measure direct voltage with multimeter between sockets (N118) 1.2 and (N118) 1.1

Specified values

- Voltage: [11.0 ... 14.5] V

Question

- Is the measurement value OK?

YES

The measurement value is OK.Further possible causes of fault

- Inspect plug connections for corrosion, pinched insulation and loose contact.

End of test

NO

The measurement value is not OK.Possible cause and remedy