Punto II 2001 1.2 8V Engine fault

[Pzolee]

Hi all.

His long time I repair my car, but does not succeed unfortunately. The engine halts after 20 minutes of usage.
The key sign flashes and it is not possible to diagnose the car. X431 no communication engine ECU (http://www.fiatforum.com/autolink.php?id=8&script=showthread&forumid=34).
Battery I join I take it off and back up. The engine starts for new one. 20 minutes pass (http://www.fiatforum.com/autolink.php?id=23&script=showthread&forumid=34) and ceases again. Starter okay. Engine not running.
I exchanged it the engine ECU (http://www.fiatforum.com/autolink.php?id=8&script=showthread&forumid=34). New electronics. The same problem.
Please help.

[f1racingmad]

it possabley sound like the key transponder reciver failing can you connect your x431 after you have reconnected the battery before restarting it.

[Pzolee]

The problem is not the key.
ECu dared it is not possible to diagnose it if the car halts.
With some minutes later the body module there may be diagnostic.
Body ECu fault?
...or eeprom data fault?

[tecnoracing]

surely there are candles sbasgliate

[cars]

We must understand why the engine turns off:
If there is not gasoline.
If there is not power supply ECU.
If there is not power supply 12V coil, injectors ....
If there is not power supply 5V sensors.
Or if there is not CAN line.
The feeding experiments you can do with a simple light bulb for 12V with an LED to 5V, while the line CAN be an oscilloscope.
Remember that these cars have big problems with the masses reinforces the chassis ground, and mass ECU.
PS:Fiat Punto have happened with spark plug cables (high voltage) that interfered with the CAN line.

[tecnoracing]

scusatemi per il mio inglese

[Pzolee]

spark plug cables???
This would be his trouble according to you???
Does this perturb the electronics?

[marinero123]

spark plug cables???
This would be his trouble according to you???
Does this perturb the electronics?

no , he want to show you possible causes ....

First of all I recommend to check fuses .... then other things.

:stoned:

[Pzolee]

I checked all fuses. No fault.

[Meat-Head]

spark plug cables???
This would be his trouble according to you???
Does this perturb the electronics?


Yes on this car you MUST use spark plug cables and spark plug that Fiat say

[dafdiagnos]

i agree with meaty - these cars only seem to run properly on genuine fiat plugs & leads. when the ecu was replaced was the phonic wheel learning procedure carried out? start car, let engine idle til fan cuts in then floor throttle 3 to 5 times. in engine bay fusebox check fuses for hairline cracks.also check key & immo key reader & multiplug & wiring to key reader for poor connection. also check connections to body control module - fuseboard by steering column. when no communication check for power supplies & earths to ecm & test can network for usual 2.5v & 60ohms. if can read codes check for u1600 - electronic key-immo system fault, u1601-c-can line error

[obdmaster]

i agree with meaty - these cars only seem to run properly on genuine fiat plugs & leads. when the ecu was replaced was the phonic wheel learning procedure carried out? start car, let engine idle til fan cuts in then floor throttle 3 to 5 times. in engine bay fusebox check fuses for hairline cracks.also check key & im*o key reader & multiplug & wiring to key reader for poor connection. also check connections to body control module - fuseboard by steering column. when no communication check for power supplies & earths to ecm & test can network for usual 2.5v & 60ohms. if can read codes check for u1600 - electronic key-im*o system fault, u1601-c-can line error
I too agree with meaty, been through this on a car got original fiat plugs and job done.

[dafdiagnos]

also worth mentioning that these suffer from throttle body faults- a common failure if you speak to fiat dealers

[cars]

The fact remains that we must understand why the engine turns off, what is missing! Otherwise it is trial and error.
I recommend this to understand and share with us the tests.

[dafdiagnos]

just read on another forum that you also loose ignition till batt removed & reconnected?

[predadan79]

Hi all.

His long time I repair my car, but does not succeed unfortunately. The engine halts after 20 minutes of usage.
The key sign flashes and it is not possible to diagnose the car. X431 no communication engine ECU (http://www.fiatforum.com/autolink.php?id=8&script=showthread&forumid=34).
Battery I join I take it off and back up. The engine starts for new one. 20 minutes pass (http://www.fiatforum.com/autolink.php?id=23&script=showthread&forumid=34) and ceases again. Starter okay. Engine not running.
I exchanged it the engine ECU (http://www.fiatforum.com/autolink.php?id=8&script=showthread&forumid=34). New electronics. The same problem.
Please help.
The Launch tester doesn't entry in imobiliser system, but in the petrol injection do. It is impossible after engine stop you don't have any stored code in injection. Read them and tell them us.

[Meat-Head]

also worth mentioning that these suffer from throttle body faults- a common failure if you speak to fiat dealers


something daft like ?12+vat


we must understand why the engine turns off, what is missing!

In theory will be Cat2 Thacham compliance, so in theory MUST keep running
if looses immo signal, but then a Movvarno/Master edcc15 will stop running!

[Pzolee]

I exchanged the spark plug and his cables.
The car is perfect. Unbelievable.
I say thank you for it to everybody very much.
He was instructive.
I worked on him since seven.
I say thank you for it once more nicely.:knuddel:

[Meat-Head]

I exchanged the spark plug and his cables.
The car is perfect. Unbelievable.
I say thank you for it to everybody very much.
He was instructive.
I worked on him since seven.
I say thank you for it once more nicely.:knuddel:

AAh result thanks to your friends here on Digital Kaos, you can now go out to night for sucky sucky, or whatever you want to do.

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LOVE DIGITAL-KAOS LONG TIME

[Weener]

On the front of the throttle body there is an earth on a ring terminal, held in place by a 5mm allen key bolt.

This provides the main earth to the engine ECU.

It is common for it to work loose. When it loses contact with the throttle body the engine will cut or not start, the key light will flash and comms with the ecu is not possible. When comms is gained there are no codes stored.

This might not be your fault but it's well worth a check.

Weener

Oooops ! I see that whilst I was typing you posted that it was fixed. Ignore the above then !

[gbesze]

It shlould be an earth problem I suppose.

[b0qdan]

It shlould be an earth problem I suppose.

Hello ,

I have a problem ... somehow like in the title .
A friend have a fiat stilo 1.6 , 2003 . Sometimes it works very fine , sometimes dosen`t . I put the tester on it ( fiat ecu scan with elm 327 ) and fine 2 errors
p1687 - is an interruption of throttled body self learning for incorrect environmental parameters
u1601 - can comunication errors TX ( c-can).
I delete the errors and watch the car .
First come on the body screen the error comunication error and on scaner shows the error u1601 ... but the car don`t stop imediatly . After the car stop it shows the 2 errors p1687 and u1601 .

Any idea ?

With regards ,
Bogdan