The letter code of the engine is included in the VIN number, e.g. 9HY or 9HZ - this is for the future to show that there are several models of the engine with the same power and giving the same power does nothing too much.
As for the pressure sensor, this information can be in the engine calculator because it is connected to the sensor and the engine calculator controls the fan and not the air conditioning controller ..
If he sees too much pressure, he should turn on the fan to break it down.
Since giving the weight to 2 pin you start the fan in the first gear, no signal from the engine calculator on the module.
This is also said in the error - fault characteristics - the system is open.
You have a wire break between the engine calculator and the module, or a broken calculator.
Do it: disconnect the battery.
On the injection calculator you have 3 plugs, from the left black 32-pin, middle 32-pin gray, right-hand 48-pin brown.
Disconnect these plugs, connect the battery. Turn the ignition on and to the 32-pin black plug to pin D4 (cable number 1550Z) enter the weight.
The fan should then start in first gear.
If it starts, you have a faulty injection calculator, as it does not start, the broken wire between the injection calculator and the fan module.
How to check this cable correctly using a light bulb: disconnect the battery, disconnect the left, black 32-pin plug on the engine calculator and the black 4-pin plug on the fan module. On the black 32-pin plug of the engine calculator, you give a plus on pin D4 (cable number 1550Z). To pin 2 of the black plug of the fan module (1550Z cable) you connect one of the poles of the bulb (e.g. 55W bulb), the other pole of the bulb is connected to ground and at this moment it is to light up.
In short, the point is that the test cable should be used to power the bulb because the meter can be shown to be functional, but after connecting the bulb it will not light because there is a large voltage drop, e.g. on a connector or the cable stays on one thread.
In French cars, one does not look at the colors of the wires, but their number, which are next to the plugs marked on the insulation of the wires.
Very important note - do not disconnect or connect the injection calculator when the battery is connected. Do this only when the car has no power - disconnected battery.
