[Solved] Xsara Picasso Air Conditioning: Condenser, Low Pressure Pipes Installation & Activation Issues

Hello everyone, I am looking for help in starting the air conditioning. I bought Xsara Picasso after the adventure, there was no condenser or low pressure pipes in it up to the bulkhead wall. I bought everything and assumed I wanted to briefly check if it works but unfortunately after connecting the 1z3 pin, the radiator fan relay turns on at the pressostat, but the fan turns off, after connecting the 1z4 pin also does not give the compressor voltage I checked all cables coming to the BSI module everything is ok The supply of voltage to the compressor activates the electromagnet. Sensors in the cabin are also efficiently checked by the meter change the resistance after heating. Lexia shows the evaporator sensor error although the sensor is working properly and the wires are also whole and reach the bsi module. The radiator fan also runs on the test the first and second run on the compressor test does not activate the relay or electromagnet.
The system, of course, filled and sealed after briefly feeding the compressor starts to cool.
Please, help me, any suggestions.

Is it allowed to be included in the ECM?

There is a cutoff request.

In the diagram I see a temperature switch that cuts off the climatic water in case of overheating the liquid and in the first picture I see "protecting the water of the engine" as active - to be checked first.

In the appendix I have a schematic if you can tell if this sensor is on pins 12.1 and 11.1 going from the air conditioning unit?

Cables No. 401 and 406 flying to BSI. Would you like some more information about the car because Xara Picasso itself is not enough, which year and which engine?

Xsara Picasso 2.0 hdi 90km 2000

I have checked the cables 401, 405 it is the yellow plug 26 pin EP1 connector and has a full transition to the motor controller.

I do not know if this has any effect on the air conditioning, but burying today I unscrew the can with the fan relays, there are three relays first left after connecting shortly turns the fan on max, the third relay turns the fan slow and the second relay (middle) it is controlled from the pressure switch from the third pin and after joining it for a short time, nothing happens, there is no voltage at terminal 30, contact 87 goes to the gray fan resistor.
Should it be like that ???

It turned out that the voltage on the second relay appears only after switching on the first gear from the relay on the right.
The second (middle) relay is responsible for the second course of the radiator fan and passes through the gray opornice.
Is there anyone who will tell you what else you can check?

There is no thermal switch mentioned in this model. Simulate the right temperature of the evaporator (something on the plus side, 10-15 * C) it can block the climate because the controller does not know whether the evaporator is accidentally not iced.

milejow wrote:

There is no thermal switch mentioned in this model. Simulate the right temperature of the evaporator (something on the plus side, 10-15 * C) it can block the climate because the controller does not know whether the evaporator is accidentally not iced.

Please tell me how to simulate the evaporator sensor, since it is efficient and the signal reaches the bsi?

If it is efficient then where do you read the lines instead of the temperature? Are you sure it is efficient, do you know the parameters of this thermistor?

The sensor I bought the second, the resistance at a temperature of about 22 degrees is 2.40 when it heats, for example: a hot air gun, the resistance decreases, and both sensors work, even the sensor from the heater is working and it works the same.

I am closer to finding the damage to the bsi module because the heating of the glass and mirrors does not work either, and I checked all the relays in the middle of the module and they are all operational.

Connect a resistor to the cables of this sensor (evaporator temperature sensor) (check for different resistances) and check if the evaporator's temperature appears at any time in the parameters reading. It is not out of the question that BSI was kneeling because cases of damage to him are not uncommon

The first attachment is the heater sensor, the second one is the evaporator.
Correct me if I'm wrong.

The evaporator sensor problem was the BSI module, after replacement and coding, the evaporator sensor works normally but the air conditioning system still does not want to start.
Because the mechanic replacing the prosostat damaged the air conditioning duct and the agent evaporated, the cable will be ordered on Tuesday then assembly and will continue to see.

Gentlemen, the pressure line has been replaced, the conduit is hot and it is not hooligans.
I wonder if there is no refrigerant pressure in the controller and there are question marks next to the radiator fan.
I checked the 8063 cable going from the pressure switch to the engine control unit, it goes on the driver pin 78 and has a full pass.
To exclude a damaged new pressure switch (replacement) I gave 1.20V voltage to the controller and showed nothing, I wonder if sometimes the motor controller is not damaged because the air conditioning shutdown request according to the annex is by liquid pressure protection, motor water protection, evaporator frost protection .
The water temperature sensor is efficient, shows the temperature in bsi and in the engine control unit, the evaporator sensor also shows the temperature and the protection is turned on.
And one more thing puzzles me, in the option of configuring the item the air conditioning is NO,
can someone suggest something?

sebastian2209 wrote:

in the option of configuring bsi, the air conditioning position is NO,

Probably from here the system can not see the pressure of the factor and other options related to air conditioning, you can do it in BSI, check the other modules.

Only I have a problem with this configuration,
how I change to yes. this system asks for the code, enters 03114 and the system asks for a secret code, enters the code two digits and two letters which I bought in aso and the system displays the wrong code.

Welcome back,
after recovering the pin code and correct coding, it was possible to code the air conditioning.
But unfortunately the climate still does not work, there are zero everywhere.
Please help.

After coding the bsi and changing the multiplex air conditioning on, the 55mm evaporator sensor is on, and the air conditioning is on, the air conditioning is ON.
Thank you very much for all your help.
Subject to be closed.