Citroen Xsara Picasso 04 - crank, no start

Greetings!

Im having trouble with my petrol Citroen Xsara Picasso -04 that cranks but doesnt start. Im getting the following DTCs:

*P0350 Ignition Coil Primary/Secondary Circuit Malfunction (Ignition coil was recently changed by the previous owner but the code persists)
*P0200 Injector Circuit Malfunction
*An EVAP code (I think the engine should start either way).


Right now im working without any wiring diagram and by the best of my general knowledge and im finding about 2V at the connectors to the injectors (2-pin) and 0V at the connector to the ignition coil (3-pin). My guess is that i should find 5 or 12V at the injectors and 12V at the ignition coil (key on, engine off). I've also checked this while cranking. Summarised: I've found good ground at all connectors but no/ not enough power.

So, I've checked for continuity between these connectors and the connector to the ECU and found out that there is continuity at the supposed power and signal wires of the ignition coil. Theres about 0.2 ohms of resistance in both wires. My conclusion from this is that theres now power leaving the ECU to the ignition coil. (Its difficult to do any back-probing at the ECU or voltage drop testing due to how the connectors at the ECU are designed).
Also, theres no apparent water or electrical damage or corrosion at the pins or connectors to the ECU.

I cant find continuity between the connectors to the injectors and the ECU so I have no idea where these get their power from or where they are grounded.

By this im being drawn into thinking its an issue with the ECU, but its a wild guess at this point. Does anyone have any valuable input to this? I've also checked all fuses that I can find.

Hey victorimba! I'm in the US, where they don't sell Citroen, so I have no point of reference on this vehicle. :blush: :silly:

BUT, missing power to the coils and injectors screams source voltage problem. They gotta get power from somewhere. On a WAG, I'd suggest that whatever passes for a main relay on this car isn't getting energized.

Without a wiring diagram, you're working in the dark. Do you have the owners manual? With that, you could at least check for power with a test light at all fuses with the key on. See who's getting powered up and who's not. Match any unpowered fuses with the fuse box description in the owners manual to see if they're related to engine performance.

For example, an unpowered Air Conditioning fuse probably isn't related. An unpowered fuse labeled something like ECM/Ignition/Injectors/Main Relay is probably at least part of the problem.