Technical Help needed starting 95 B

[Lluis Elson]

Hello everyone,

I have a 95 Barchetta that we have rebuilt the engine. The entire rebuilding process has been completed and several old components have been replaced such as the cam opener, the clutch and sensors. Everything is assembled and ready to start,but the car don't start.

When the ignition is turned on, the injection error light and the code key light come on. We have tried to connect the ECU using multiecuscan and KKL cable to check and clear errors, but we are unable to do so. However, we can connect to the airbag and ABS units without problems.
Having ruled out a connection, program or cable problem, we have checked the ECU contacts, wiring and even bought a new ECU to see if this was the problem. The fuel pump has also been checked and it works fine. But nothing has worked.

The car still won't start and we don't know what else we can check.
Any ideas or clues would be welcome because right now, we don't know what else to look at.

Thanks in advance,

 

[jackwhoo]

You won't be able to start with the key symbol illuminated.
Have you ever seen it running?

 

[Lluis Elson]

It running only once and then stops ...

 

[jackwhoo]

Did you used to drive this car before you rebuilt engine?

 

[jackwhoo]

Def sounds like immobiliser is stopping engine running.
Try second key
The key light must go off

 

[jackwhoo]

If you using a 3pin adapter to connect multiecu scan the locations of the plug in vehicle are different for each ecu. The air bag ecu plug is in different place to engine ecu diagnostic plug.

I'm not barcetta expert fingers xed someone who is will join in.

 

[Lluis Elson]

Did you used to drive this car before you rebuilt engine?

Yes, it runs one year before the serious breakdown

 

[Lluis Elson]

Def sounds like immobiliser is stopping engine running.
Try second key
The key light must go off

Unfortunately I don't have the second key. Do you know if I could request one from Fiat?

 

[Lluis Elson]

If you using a 3pin adapter to connect multiecu scan the locations of the plug in vehicle are different for each ecu. The air bag ecu plug is in different place to engine ecu diagnostic plug.

I'm not barcetta expert fingers xed someone who is will join in.

Yes, we found then and tested. But the only one that don't work was the ECU connection

 

[jackwhoo]

It is possible if wiring plug connected to wrong sensor on engine to cause no communication with ecu.
With the work you have done is it possible wiring connected incorrectly?

 

[Lluis Elson]

It is possible if wiring plug connected to wrong sensor on engine to cause no communication with ecu.
With the work you have done is it possible wiring connected incorrectly?

I think it could be. I'll check it again next week

 

[LeftyGreg]

Unfortunately I don't have the second key. Do you know if I could request one from Fiat?

What you need for a 95 model is the red key. This is the master key and needed to program other keys

Not sure what you can do if you haven’t got it, you could ask a Fiat dealer, but not sure how successful it will be

 

[Lluis Elson]

What you need for a 95 model is the red key. This is the master key and needed to program other keys

Not sure what you can do if you haven’t got it, you could ask a Fiat dealer, but not sure how successful it will be

View attachment 476847

Sorry, but i don't have the red key. I called the previous owner and he doesn't have it either

 

[Lluis Elson]

It is possible if wiring plug connected to wrong sensor on engine to cause no communication with ecu.
With the work you have done is it possible wiring connected incorrectly?

Sensors checked and ok. We'll check wiring next. Thanks

 

[Mike1alike]

Did you connect the little ground cable to ECU?

 

[LeftyGreg]

Sorry, but i don't have the red key. I called the previous owner and he doesn't have it either

If you go through this topic, it seems that dealers in Spain can get the keys sorted out

Thread '3 Keys ???'
https://www.fiatforum.com/threads/3-keys.486278/

Also, have you got the key code card as this might make it easier

 

[Mike1alike]

But there is nothing wrong with the key, no need to look for another key. The ECU is not communicating, that's why IMMO light stays on. If it was the key, you could have connect to ECU and it would even throw an error related to problem reading key code.

 

[GrandePunto PL]

http://download.fiatforum.bg/Books/Barchetta/ - maybe there is something useful.

There is also a "method" for all Fiats: use manuals (and parts) for other models from same era, with same engine (and ECU family).

 

[Lluis Elson]

Did you connect the little ground cable to ECU?

yes, it's connected

 

[Lluis Elson]

If you go through this topic, it seems that dealers in Spain can get the keys sorted out

Thread '3 Keys ???'
https://www.fiatforum.com/threads/3-keys.486278/

Also, have you got the key code card as this might make it easier

Unfortunately i only have the grey/blue key that's all