Jumper 2.2HDi DCU102 no starting no signal to injections

[Fuller]

Hello,
I have a problem with citroen jumper 2.2HDi with viseton dcu102 ECU. Car was cranking but no start. ECU not sending signals to injectors. After diagnostic I haven't any error codes with ECU. All power supply to ECU is good, the power for injectors is 120V, power for sensors is 5V. The signal from CKP and CMP are good. I have timnig synchronization and immo gives permisson to start. And I don't know what problem with that car.

Foto with voltages on ecu
904989

[meser75]

Is the signal from the fuel pressure sensor OK? What is the fuel pressure in the rail when cranking? Do the actuators have the ability to control the injector manually?

[Fuller]

Is the signal from the fuel pressure sensor OK? What is the fuel pressure in the rail when cranking?

Yes the fuel pressure is OK, when cranking I have about 700bar in the rail.


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[meser75]

When cranking, are there attempts to start when the pressure is within 300 bar?

[meser75]

Is the MAF reading OK when cranking? Wash on these motors the problem of starting when the EGR is stuck in the open position.

[Fuller]

When cranking, are there attempts to start when the pressure is within 300 bar?

No any attempts to start when cranking because ECU doesn't send any signal to injectors and pressure rising up to about 700bar.

I must check MAF paramaetrs because because I didn't pay attention on them


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[meser75]

See also: is it possible to control the injector manually?

[Fuller]

Isn't possible by diagnostic software only cilinder disconnection when engine is running


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[meser75]

A short in the injector or a short in the wires to ground? Maybe there were errors in the short circuit of the injector during the first diagnostic? This is a visteon: an error can be registered only after the engine starts.

[meser75]

Have you checked the signal to the injector with an oscilloscope parallel to the injector ?

[Trice1001]

Camshaft sensor ! you can screw it and slide in and out , is camshaft sensor not in right position or defekt shit 2.2 hdi will not start!! check it

And yes without camshaft sensor 2.2 HDI will not start.

[Fuller]

Have you checked the signal to the injector with an oscilloscope parallel to the injector ?

Yes i checked but is only checking signal to injectors after ignition

Yesterday I checked signals from camshaft sensor and cranckshafr sensor and I see one noise on crankshaft oscilogram like this
https://uploads.tapatalk-cdn.com/20220809/c401f794154c15209038e513e0e81455.jpg

So after that I unscrewed the starter motor and checked flywheel and after rotating them i sow missing tooth on
https://uploads.tapatalk-cdn.com/20220809/31d584d2540c8456bc6a9c66be26087d.jpg

I weld missing tooth to test and car was starting. Success.


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