Renault Megane 2 not starting

[eduardo74]

I have problem with DPF on 2007 year 1.9dci F9Q engine. DPF message error displayed on dash, one of pipes od dpf are broken. Replaced broken pipe and I can crank, but no start.

I have DF040, DF041, DF042, DF043 problem with injectors 1.DEF on renault clip, also DF039 but maybe not connected with previous.

I asking dealer, they says problem with ECU?

[eduardo74]

Is possible that is DFP full and totally dirt and no exhaust, and car doesn`t start?

[mavi]

hello

NO.
DFP is not the problem to not start, ckeck the injection, the problem came from injections, ckeck signal from ecu with
Oscilloscope.
Regards

Mavi

[eduardo74]

Engine cranking, injectors have signal, but no exhaust.
We try with start spray, without luck.

I think that exhaust is closed tottaly, will try to remove pipes on dpf.

After removing nothing, exhaust is coming from open pipe, but still no starting.

[eduardo74]

Problem solved.
DPF is not problem, problem was FETs in ECU. Unbelievable experience.. now done .. Car flying again!

[Meat-Head]

Problem solved.
DPF is not problem, problem was FETs in ECU.

how did you find and solve this?
thanks

[eduardo74]

Must open ECU, bottom and top cover. Don`t need to desolder anything. Just heating both covers and open it.
At top side look for failure fet, just test with multimeter, there is 5 fet and I think one "diode". Found one fet have zero ohms between drain, source and gate. I replaced him with one from EDC15 removed from VW tdi.

[mexanico1971]

Must open ECU, bottom and top cover. Don`t need to desolder anything. Just heating both covers and open it.
At top side look for failure fet, just test with multimeter, there is 5 fet and I think one "diode". Found one fet have zero ohms between drain, source and gate. I replaced him with one from EDC15 removed from VW tdi.

Hi
do you have pic"s of the Mosfet

Thank"s in advance