Fuel pump not running.

C3 HDi70 from 2011

My C3 won’t start, first it cranked and fired on a few cylinders but died, OBD says misfiring cylinder 1-6.

I've tested the following:
Listen for fuel pump running noise: no sound at all.
Multimeter on fuse F5 and F10: no voltage on key turn or engine cranking.
Multimeter on fuel pump connector pins: no voltage on key turn or engine cranking.
12v probe connected on fuel pump pins: no sound at all.
tips-for-any-citroen-c3-f8/2011-2016-en ... -t494.html

Is it possible that both the pump AND the BSM dies or am I missing something, what should i try?


Christian Larsen

ChristianL wrote: ↑Sat Mar 11, 2023 7:23 pm Listen for fuel pump running noise: no sound at all.

Hi

Where were you listening to the fuel pump? Its a mechanical pump driven by the cam belt, you won't hear it running?

ChristianL wrote: ↑Sat Mar 11, 2023 7:23 pm Multimeter on fuse F5 and F10: no voltage on key turn or engine cranking.

If you don't have 12v to earth on the fuses you expect then check for a supply to the module. Go back to the BSM power supply and look for a 12v to earth supply. Check other fuses for power.

Your CAR BIO information says you don't know the year. You selected this when you registered.