Hi,
You don't need to send the ECU away to check for excessive current. Just measure the current an then unplug each unit connected to the F36 fuse until the excessive current draw goes away. It is either that ECU or something connected to it. If unplugging all the ECUs / components does not produce the same drop in current as pulling the fuse, the fault is in the wiring loom or connectors (or you missed an ECU or other component.
A quescent current draw and F36 current draw quescent and "on" from a similar Qubo would be really useful if someone can measure it. If someone near Cambridge hs a Qubo but no ammeter I could do the measurement.
It annoys me that supposed mechanics and supposed auto electricians cannot do fundamental diagnosis without resorting to box changing ro sending ECUs to a "specialist".

Robert G8RPI.

Robert G8RPI,

Hi,
3 ways i see it.

1- Go to Fiat and ready for the shock of my life
2- Go back to my mechanic and hope for better everyweek
3- DIY fault finding , anything connected to them 4 electronics units connected to F36

Just used the car, and the digital temprature shows 60'c, and quick succession of indicator lights flashing when locking the car.

Thank you for your time.


Regards,
Zron

I am an electronics engineer but car electronics is not my specialist subject, however if your technician suspects the ECU which could have nothing more than a Leakey supply decoupling capacitor all you need to do is u n plug it while monitoring the current draw across the fuse holder a drastic drop in standing current would confirm this to be the cause ,however for my money I would try un plugging the car radio first and say this for a good reason,I just bought a Fiat seicento as my teenage daughter said she would like to start driving lessons so I drove it back the 15 miles no problem,parked it up at my unit and when I came to drive it 3 days later it would not start as the battery was dead,however when I got in the car I noticed the face off radio was lit up,it wasn't when I parked it up,so for some un known reason the radio had switched it self on when the car was parked up,I removed the face off part to disable the radio and the battery has not gone flat since.

Hi Michael Dranfield,

We have checked the common faults, and stereo unit was 1 of them, i unplugged the whole radio unit, and the same parasitic draw still ongoing.

Its the location for both of the volumetric alarm ECU ,alarm siren ECU that i need to look for water ingres.


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UPDATES-

Just spoke to the auto electrician on the phone, he suggests its likely the alarm siren ECU, because this is the alarm back up that has its own battery, he is assuming that there is a fault somewhere that causes it to constantly charging.
He is coming to look at it next wednesday, £50 p/h charge.
Worth a go ?


Thanks.


Regards,
Zron

Zron said:

Hi Michael Dranfield,

We have checked the common faults, and stereo unit was 1 of them, i unplugged the whole radio unit, and the same parasitic draw still ongoing.

Its the location for both of the volumetric alarm ECU ,alarm siren ECU that i need to look for water ingres.


-----------------------

UPDATES-

Just spoke to the auto electrician on the phone, he suggests its likely the alarm siren ECU, because this is the alarm back up that has its own battery, he is assuming that there is a fault somewhere that causes it to constantly charging.
He is coming to look at it next wednesday, £50 p/h charge.
Worth a go ?


Thanks.


Regards,
Zron

Click to expand...

Hi,
The alarm is a likely suspect, especially the siren unit. It has internal rechargeable batteries that can leak causing corrosion and all sorts of issues. I've no idea where it or the alarm ECU is on a Qubo though.


Robert G8RPI.

Robert G8RPI,

I was thinking i could be the unlucky one, as this can not be the common fault with none reported within here.

Will go back to the mechanic with this and see what he says.

Many thanks.


Regards,
Zron

Zron said:

Robert G8RPI

You know your car, in depth!

I will show your view to my mechanic, so how exactly does it work with your way? Can you fix it if it is how you see it?

Thanks
Zron

Click to expand...

He's a REAL Guru...!!
He even uses special imported Italian air in his (Italian) tyres for sure...