Cranking but not starting Fiat Scudo 2.0 JtD

Ovidius · 2023-05-31 00:13:44

I have a 2006 Fiat Scudo 2.0 JTD with 200,000 miles that I’ve been using for the past year. In January, I started experiencing a peculiar issue with the van. While driving normally, the engine would suddenly shut off, prompting me to pull over. When attempting to restart, the temperature gauge would go into the red zone, and the car would only crank without starting. It’s important to note that there are no cooling system problems, and the engine never overheated.

To get the car running again, I found that disconnecting the battery and leaving it for 15 minutes would do the trick. This problem occurred about four times in four months, and each time the battery reset method worked, until yesterday when the car failed to start altogether. It would crank but without starting . Since then, I’ve taken some steps to troubleshoot the issue.

I inspected the in-tank fuel pump, and it appears to be functioning properly. I also checked the fuel pump wiring plug for voltage while cranking, but there was no voltage present. I replaced the camshaft sensor and examined the crankshaft sensor, which seems to be in good condition and responsive to metal when tested with a multimeter. However, there is no voltage at the wiring plug for the crankshaft sensor, and grounding it is not possible.

Furthermore, I inspected the wiring up to the ECU, which seems to be in working order. Additionally, I cleaned the grounding points and checked all the engine bay connectors by plugging and unplugging them.
I suspect the issue might be with the ECU or at least something related to this as it seems like the pump doesn’t get the signal needed to start priming diesel.

What else I should check or there are any know common issue that might be affecting my car?

Last edited by Ovidius (2023-05-31 00:20:41)

Ovidius · 2023-05-31 17:07:45

Anyone ?

JohnDragonMan · 2023-05-31 22:28:37

ok hmm it could be a wiring issue with the engines loom. a lot of taxi mechanics tell me its common on higher mileage DW10s.

theres a possibility that the RFID chip in your key is acting up, do you have a spare key to test it with? honestly i have killed one before by getting it too close to arcing electricity.. best not ask how.
following the immobiliser, the rfid pickup ring behind the steering cowling could have dry solder joints i have seen it in other vehicles before and fixed it, on these vans though you can just replace it.

do you get condensation in your van? i do in my old fiat panda.. it causes the fuses to corrode and not make a connection.. try pulling them all then re-inserting them and see if that helps.

failing that, try manually feeding power into the fuel pump and see if the engine runs. it may be something as silly as a relay failing... i think these have a fuel pump relay. it will be in the box outside however i am not sure on which one it is.

just some info on the DW 10 engine. these engines only need 3 working sensors to start. the crank position sensor on the very top of the bell housing right near the engine (under the water jacket thing), the cam position sensor, i between the cam belt cover and oil fill point on the rocker cover, and the fuel rail pressure sensor on the common rail (never known of one fail)
these sensors would not affect the in tank pump however. that should always prime when you turn the key to the 2nd position.

also check your ignition switch is letting power through. if i remember right they have multiple lives going out at 200k it could be getting a little tired. thankfully its an easy thing to change as its on convenient plugs

some things to try...

Last edited by JohnDragonMan (2023-05-31 22:30:22)

Ovidius · 2023-06-02 08:55:24

Thanks a lot for al the information .
Since I have described my problem I have found another spares car near me and I took from that car the fuel pump relay , glow plugs relay , comfort module , key and ECU . I have first replaced the fuel pump relay and when I switched the ignition on the fuel pump started priming but it won’t start , then I have managed to connect my diagnostic tool and the error present is P0340 Phase sensor , Coherence revs sensor at startup which I can delete but it would come back , I want to mention that I still don’t have any voltage present at the crankshaft wiring . After this I have replaced the ECU , comfort module and ignition lock and I checked the errors before cranking , the spare ECU had two errors logged unrelated to my problem which I managed to deleted and then went and tried to start the car . It didnt and now on this new ECU I have a new error that is logged in P1135 3 Piston Deactivation , short circuit to ground / o.c. Which I can delete it but it would always come back. If I replaced the ECU with my original one the error also changes to the P0340 and vice-versa.

JohnDragonMan · 2023-06-02 18:27:29

hmm ok, does your diagnostics do live data? from what i have been told, you need at least 500 RPM of cranking speed and cam and crank shaft to be in phase. given the fuel rail pressure is high enough no matter what other sensors say it should start.
now its interesting that one ecu says something different to the other.

so i googled the code and found this:

Wrong code definition - PSA codes are system specific.
P1135 on an EDC15C2 - 3rd piston deactivation solenoid. Short circuit to earth, or open circuit.
The 3rdPDS is on the top of the HP pump and should have a resistance of 25-30 Ohms between it's two terminals - plug off. It should show a 12v feed to one for a few seconds at key-on.

form here : https://www.honestjohn.co.uk/forum/post … tm?t=68900

now i know from past experience that the P0340 fault can be quite serious. cam belt snappage serious as its the error it gives when the cam and crank are out of phase. more often than not its just the crank position sensor that needs changing. yes i know you have changed it but how did the old one look?
during first lockdown i pretty much rebuilt my van, even going as far as to install aircon to it. this is what happened to me..

no cam and crank sync caused by this:

something maybe off the old clutch got picked up by the flywheel and smashed the sensor. the sensor broke up and covered the flywheel with broke up magnet from the end of the sensor. that caused hell. i managed to take the bottom cover plate off under the bell housing and jet washed the flywheel through the starter hole. 3 years later its still perfect. i did pack the sensor out with a few washers so it sits a bit further away from the flywheel.

this is my thread on the matter if you want to have a look: https://dispatchexpertscudo.org.uk/foru … 7959#p7959

try that sensor first.. however failing that i am leaning towards an engine wiring harness fault.

grab yourself one of these magic wizardry broken wire detector tools.

for like £23.. they are.. well magic.
https://www.ebay.co.uk/itm/354324971083

seriously check this out: https://www.youtube.com/watch?v=IGl3cB6MuD0
its saved me hours of pulling looms apart on all kinds of things.

hope this helps!

Vincew · 2023-06-04 17:58:22

Sorry I can't help with your issue but am following closely as I have the save van that is not starting. I am currently waiting on a replacement glowplug relay as mine is not working, I wondered as you have the same van as me you could look at my post https://dispatchexpertscudo.org.uk/foru … hp?id=1747 and let me know what it looks like on your van. Would be much appreciated. Where are you as if you were close, I'm Devizes Wiltshire we may be able to do some comparisons and may be find out what's not working on your van assuming the glowplug relay fixes mine.

Cheers
Vince

JohnDragonMan · 2023-06-05 23:22:17

hmmm also one thing i have just thought of:
these vans have a fuel pump shock trip switch. if i remember right its behind the power steering fluid bottle (or somewhere around the ECU area). give it a good firm press. if you hear it click that will have cured a major factor in your issues! i only know as when i was doing all the work on my van i dropped a spanner on it which caused it to trip!

Doodlebug · 2023-10-13 20:43:44

Can anyone tell me where this is located on 2004 scudo
Thanks

Vincew · 2023-10-13 20:56:30

Doodlebug wrote:

Can anyone tell me where this is located on 2004 scudo
Thanks

if it is the 2.0L version it located top left of the engine bay when standing at the front of the van looking at the engine, it is tucked right up in the corner.

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#1 2023-05-31 00:13:44

Cranking but not starting Fiat Scudo 2.0 JtD

#2 2023-05-31 17:07:45

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#3 2023-05-31 22:28:37

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#4 2023-06-02 08:55:24

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#5 2023-06-02 18:27:29

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#6 2023-06-04 17:58:22

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#7 2023-06-05 23:22:17

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#8 2023-10-13 20:43:44

Re: Cranking but not starting Fiat Scudo 2.0 JtD

#9 2023-10-13 20:56:30

Re: Cranking but not starting Fiat Scudo 2.0 JtD

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