Fiat Ducato 244; 2.3 JTD; 2006 - Emergency mode, 1500 revs, does not respond to

Hello.
I am writing about a Fiat problem.
After starting the engine, the computer enters the emergency mode and gives 1500 rpm of the engine and lights the engine light. Does not respond to the accelerator pedal. I exchanged for another used, zero reaction.
After unplugging the cube from the potentiometer on the pedal, the indicator goes out and the revolutions slowly decrease to about 900. After plugging in, regardless of which pedal (whether my old or newly purchased revolutions increase and the indicator lights up).
I checked the cable wire by cable to the computer itself, everything seems fine.
I have heard different opinions on this subject:
- Crankshaft sensor
- Reverse sensor (I disconnected quite - no reaction)
- Brake pedal sensor
- Clutch pedal sensor
- Pressure sensor on the high pressure pump
Has anyone had a similar case and knows how to fix it?

connect the tester and check why it enters safe mode.
99% is not a gas pedal.

A mechanic with a computer came up to me like a bladder cat and said that a permanent error was popping up and that he could not see the accelerator pedal.
Another friend with a handy computer only checked and showed that there were two errors, but neither numbers nor descriptions.

I also think that it can be an ABS pump, because first of all it doesn't work and secondly, when I have one of the two fuses inserted from it, the ignition is turned on just like to turn the key in the ignition once.

change specialists.
Unfortunately, until you read the errors and basic parameters we will not help.

Fortune-telling, mistakes as you can see are, and not enough that you don't even have descriptions, take a proper diagnostics because it's a waste of time because as you can see money on stupidity is not a waste.

@KarizmoGSM - So far, I haven't paid a penny to anyone, everything is known, but you can see how they are doing. I'll have a moment to download a good diagnostician and let him think what may be wrong.

So yes:
P0120 - Accelerator pedal position sensor 1
P0220 - Accelerator pedal position sensor 2
P0645 - A / C Compressor Relay Control Circuit

On the old and purchased used accelerator pedals the same errors

The computer did not even show any percentages when pressing the accelerator pedal either.

That is, to check the gas pedal power supply.

I checked all six cables from the pedal plug to the computer plug with a voltage meter. They are efficient, the transition is.

Read with understanding.
It's about a gas pedal power outage.
Since the cables are working and the accelerator pedal is under control, the controller does not supply power to the accelerator - the engine driver is faulty.

How might the accelerator pedal be out of power? When I remove the plug from the potentiometer, the engine check goes out and the revs return to normal. When I put it in again, the check lights up and the turnover increases.

You have 2 masses 2x5V and 2 paths, measure with a meter.

IMG_201702...111952.jpg Download (649.96 kB)

Which pins should I check for ankle tension?

IMG_201702...111442.jpg Download (327.37 kB)
IMG_201702...111714.jpg Download (389.56 kB)

It turns out that three pins are walking on the paths.

I measured the voltage at the ankle beam with the engine running. Here are the effects.
One cable for plus cable.
1- 0V
2- 9.30V
3- 4.60V
4- 14.16V
5- 5.50V
6- 14.16V
One cable for body weight.
1- 4.90V
2- 4.90V
3- 1V
4- 0V
5- 0.40V
6- 0V

These second measurements are correct.
Now connect the accelerator pedal, press it and measure again just like the second measurement, i.e. to the ground.
Measure the resistance on the pedal when the plug is disconnected.
Measure between
6-1
4-2
6-5
4-3
Press the pedal and see if it changes nicely between 6-5 and between 4-3.

I connected both pedals to the ankle and after connecting the second cable to ground, it showed approx. 4.9V on all inputs / outputs
I measured the resistance on the pedals and it changed nicely everywhere
I was at a car electrician, he had a pedal from another car with the same entrance. Same situation, identical errors.
He didn't want to take the car to the workshop.

I decided to spin the computer and it turned out that one of the paths on the board has burned out.

IMG_201702...205128.jpg Download (1.75 MB)
IMG_201702...205148.jpg Download (1.87 MB)

A friend of electronics soldered a wire shortly to work around the path and now everything is fine.
The car is functional and responds nicely to gas.