Renailt dci no 5volt from ecu

[rideon]

Still wondering..... engine is 1.9 or 2.2 ..........??

[metercar]

For educational purposes the pdf cited

[BeianM]

Still wondering..... engine is 1.9 or 2.2 ..........??

What, you cant tell from the pic! it's 2.2. We dont have 1.9 mk3 here in the UK

[ABD ERRAHMANE]

try unplugging EGR made ​​a test

[BeianM]

yes, unplugged the egr. Fault remained. Going to test ecu out of car.

[rideon]

Not sure if ;water in diesel,rail pressure sensor,engine coolant is 5 volts...
Throttle is 5 volts,2 separate outputs from ecu
EGR,AC pressure sensor-5v
Airflow,afaik is 12 v...
If the car got cruise control,there might be 5 volts from ecu in CC switches.....

[BeianM]

I found a rectifier diode blown in the ecu which I have replaced, however I still have all the same faults so assume the ecu is dead. Going to try it on another car. Oh, MAF should have both 12 & 5v

[BeianM]

Anyone any good at fixing ecu's! I put this in another car & it gives all the same faults So of to the scrapyard to get another one. anyone know to virginise so I dont need the immo chip & the body controller.

[BeianM]

I have fitted a working ecu. The ecu now reports of too high a voltage on each of the injuctors! The injector resistance's are fine measured from the ecu plug. There is no short circuit so I'm baffled

[metercar]

you work in the same car on the last 5 years?

http://www.digital-kaos.co.uk/forums...edc15c3-76675/

[BeianM]

Na! fixed & sold that one a long time ago. That had shorted injector wires that blew the ecu. I do a lot of Espaces. I see one post here that it was poor connection at the ecu on the injectors. But all four of mine report this! Wondering if it is a cap going in this ecu. I'm not having much luck with this one.

[metercar]

check capacitor on 5v lines, it's frequently burn and short circuit

[BeianM]

I'll have a look. There was no evidence of popped caps. I put temporary injectors on the connectoes of the main two reported faulty. The car is now trying to start. I pulled them out & one is very coked up. Don't know if this is why it reports as high volts.

[BeianM]

fitted two injectors, car now running. Whoopee! What a renault with no faults! I wonder how long that will last. Is not showing faults for the other two injectors even. So there you go

[rideon]

If i understood this right......
Engine starts then stops,diag tool says 5 volts missing => change ecu
new ecu says injectors faulty..... replace injectors=> car ok
Hard to believe that a car can broke in that way...
maybe with a little help....