Signal problem maf citroen c3 1.4 hdi 90cv delphi

Hi to all, this c3 1.4 hdi 90hp 2002 with ecu delphi has a problem with the maf. After the various measurements ? arrived at the problem that the ecu is not communicating with the mass air flow sensor...
In diagnosis from air mass meter, the car does not accelerate as it should but does not even make a tear smoke.
Tested it with a meter new, checked all the wiring, maf, and their voltage.
If I'm going to see the real values with the car in motion is giving me the value of air mass measured but it's not giving me the target, the test is made with a new maf.
The only thing ? the ecu does not receive the signal sent from the maf. As you can? intervene on the ecu?

excuse yourself on the ecu pins and measure with a multimeter the signal that comes from the maf then measure the signal coming from the temp sensor intake air 5v and negative, and the answer comes by itself

On the pin of the control unit, I checked and do not reach the signal from the maf...

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Originally Written by dvdtuning

On the pin of the control unit, I checked and do not reach the signal from the maf...

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on the pin of the maf goes out the signal then if you remember the error code and description ? a lot of help but it says short circuit to positive ? the maf ? powered 5v and the negative ?

The error it seems to me, p0121, the maf has 5 wires, negative, positive, temperature, 2 signal...

but on the harness with the ignition on you will find both 12v and 5v?

pin1=signal temp. air,pin2=reference, pin 3=not used pin 4= +12v power ( fusibilef15 the fuse box and relay in the engine compartment) pin 5=signal ground air pin 6= ground

It gives me both the 5v ke the 12v, I have followed the scheme of testing that I get from the kts bosch...

Error p0102, meter contact to the ground!

but if you erase the dtc reoccurs?