VW Golf 4 1.9tdi 110km - Understanding the Function and Testing of Electric Charge Sensor

I warmly welcome
Can anyone tell me how to check the electric charge sensor? How does it work because there are 4 wires.

Hello.
The boost sensor called the absolute pressure sensor, MAP sensor, the intake manifold sensor in this version is combined with an air temperature sensor, therefore it has 4 leads. These are two sensors in one.
In 1 fig. Diagram of this sensor (pins 1,2,3,4), and 73,31,71,52 are pins to the ECU
Fig. 2 order of the pin in the sensor.
Attached, a detailed description of the operation, specification, diagnostics of this sensor for VW Golf 4 1.9tdi 110km

The instructions show.
1.2 pin compressed air temperature sensor.

1. Pin output signal or mass (it is possible that 5v depending on the temperature will drop on pin 2) 3kohm - 20st, 300ohn - 90st relative to the second pin
2. Pin + 5V from the computer should be relative to the weight from the battery

3.4 Pin boost pressure sensor.

3. Pin + 5V from the computer should be relative to the weight of the battery.
4. Pin output signal.

I still don't know how the pressure change sensor should behave.
Is there any voltage divider because pin 1 sensor mass 3pin + 5v 4pin linear voltage 0-5V depending on pressure? Is there a digital signal from the sensor.

You fasten the usual mechanical pressure gauge and see if its indications coincide with those of the diagnostic system, based on the sensor readings. The signal is voltage. Assume that if the sensor correctly indicates the atmospheric pressure, with the engine off, it is in working order.

I agree with you 100%. However, if I wanted to increase the boost pressure through a sensor measurement error. I wonder if something would work out.
There is one option given on the forum to increase the fuel dose in a similar way works 100%. However, as you know, increasing the dose of fuel without a dose of air in the diesel causes an increase in temperature and thus burning of the pistons.

rsv6 wrote:

However, as you know, increasing the dose of fuel without a dose of air in the diesel causes an increase in temperature and thus burning of the pistons.

Nonsense. However, I recommend reading a lot about the principle of operation of a diesel engine.

The MAP sensor has no characteristics from 0 and cannot show 5v at maximum pressure.

robokop wrote:

rsv6 wrote:

However, as you know, increasing the dose of fuel without a dose of air in the diesel causes an increase in temperature and thus burning of the pistons.

Nonsense. However, I recommend reading a lot about the principle of operation of a diesel engine.

It is about increasing the dose by reducing the resistance of the injection pump temperature sensor. The engine then works as if the suction effect is very satisfactory. Preferably a 150ohm multi-turn potentiometer is installed in series with a 330ohm resistor and switch. The 330ohn resistor is designed to protect against a complete short circuit.

The lower the resistor resistance, the better the motor is, but you have to set it so that it does not kick.

The effect I was able to achieve is acceleration to 100km / h from 12.5s to 9.5s

At lower resistance, the engine works even better, but then it starts to kick. If it is black, it doesn't burn everything.

So I'll try to check the sensor with a voltmeter and oscilloscope. How it behaves when driving. Which voltage corresponds to the given boost pressure. And if you can influence them easily.

Thank you so much for setting I thought this sensor was more complicated. Type two pins power supply and two more digital signal.