Technical Throttle body specs

[Yodaspike]

Hi
Have a 03 fiat punto 1.2 16v, need to know what the resistance readings should be on the pins, ie motor and grnd to signal 1 and grnd to signal 2.
Getting p0120 error.
Everything works fine when reving the car. Goes into limb mode when driving

 

[judderbar]

Hi
Have a 03 fiat punto 1.2 16v, need to know what the resistance readings should be on the pins, ie motor and grnd to signal 1 and grnd to signal 2.
Getting p0120 error.
Everything works fine when reving the car. Goes into limb mode when driving

What ECU do you have?

 

[Yodaspike]

What ECU do you have?

Dont know, to old to see much, but it is the stadard one that comes with the car

 

[judderbar]

Dont know, to old to see much, but it is the stadard one that comes with the car

What do you mean by limp mode? My 2004 1.2 16V does not have that feature. It might be available on the evo face lift model or grande punto.

Are you saying the ECU does not have a white label on it?

 

[Yodaspike]

What do you mean by limp mode? My 2004 1.2 16V does not have that feature. It might be available on the evo face lift model or grande punto.

Are you saying the ECU does not have a white label on it?

Use to, have is gone, have the same car as you, well it basically restrics your throttle to 29% can push the pedal as much as you want the throttle body doesnt open more than that, clear the errors, start the car and rev it up, no issues, only when you drive, and push the peddal past 29% then it goes into limp mode/protection mode or what ever mode you call slow

 

[Yodaspike]

Signal 1 gives me 1.7k ohm on closed the other around 600ohm, on open the one is 500ohm and the other about 1.6kohm, and it doesnt seem correct

 

[judderbar]

Signal 1 gives me 1.7k ohm on closed the other around 600ohm, on open the one is 500ohm and the other about 1.6kohm, and it doesnt seem correct

I think what is more likely is the potentiometer in the throttle body is broken and that is causing what you are calling limping.

 

[Yodaspike]

I think what is more likely is the potentiometer in the throttle body is broken and that is causing what you are calling limping.

How to check that?

 

[judderbar]

How to check that?

I remember taking the cover off of mine and seeing the resistances and the wipers.

 

[judderbar]

There must also be a potentiometer in the throttle pedal.

 

[Yodaspike]

Except for the tracks and brushes i dont see any thing

 

[Yodaspike]

There must also be a potentiometer in the throttle pedal.

Yes, but apparently those almost never give any problems

 

[judderbar]

i will check what markings are on my throttle body and measure the resistances

 

[Yodaspike]

i will check what markings are on my throttle body and measure the resistances

Cool, thanks a mil

 

[judderbar]

Cool, thanks a mil

Here goes. open circuit unless resistances given. Throttle position unchanged. Closed.
1-4 1.5
2-3 1037
2-6 695
2-5 1298
3-6 1407
3-5 571
6-5 1715

All the pins are insulated from the metal of the throttle

 

[judderbar]

Here goes. open circuit unless resistances given. Throttle position unchanged. Closed.
1-4 1.5
2-3 1037
2-6 695
2-5 1298
3-6 1407
3-5 571
6-5 1715

All the pins are insulated from the metal of the throttle

you can check your throttle wiring with these pinouts

https://www.fiatforum.com/downloads/punto-me73h4-ecu-pinout-pdf.404/ From the pdf for a car without Allarme for the engine plug 1 nearest the windscreen it seems 6pins 23 28 39 43 56 and 58 are going to arrive at that throttle plug

 

[Yodaspike]

Here goes. open circuit unless resistances given. Throttle position unchanged. Closed.
1-4 1.5
2-3 1037
2-6 695
2-5 1298
3-6 1407
3-5 571
6-5 1715

All the pins are insulated from the metal of the throttle

1-4 3
2-3 1358
2-6 800
2-5 1666
3-6 1740
3-5 733
6-5 2110

 

[Yodaspike]

As far as i know the 2 signal pins, when open the one should have the same value as the other when closed, and visa versa

 

[judderbar]

Ok. I will tell you which of those numbered pins appear at the ECU plug. maybe only one pot is connected to the ecu?

 

[Yodaspike]

Is your new? Newish,
But either way, mines readings are way off from urs, so will go and check a few tomorrow, if i can find ine that seems ok, will try it and see