golf IV 1.9TDI klimatronic - doesn't turn on the compressor

I need information what is needed to start the compressor clutch controlled by the 1J0 919 506K (14pin) module.
What has been checked:
Klima completed and tight. Short-time clutch - air conditioning is working.
There are no errors in the climatronics.
In measured values - 1 channel position 1 - value 0 (not switched off)
in channel 11 in position 4 unfortunately it does not show the pressure value in the system.
On the module plug
1 (WP) - (it probably is used to turn on the electric water pump, so it does not matter)
2 (P) - signal from the pressure sensor - is 2.58V
3 (Bi) - What should be here? (I have a description that the mass appears when the engine is overheated)
4 (K) - is 12+ fixed
5 (-NTC) - there is a bridge with pin 14 (+ NTC)
6 (31) - is a constant mass
7 (T2) - radiator thermal switch (not checked - but it should not matter)
8 (T4) - after switching on the air conditioning, + 12V appears on the panel
9 (15) - after switching on the ignition + 12V appears
10 (MK) - output for the compressor - cables to the coil all - if I give here 12V, it is a climate
11 (Tmot) - ???????
12 (RES) - WHAT SHOULD BE HERE - in the diagram the cable goes to the climatronic
13 (HL) - ???????
14 (+ NTC) - bridge with pin 5
I did not check the other 4-pin plug on the module - but it is only a fan control so it should not be affected.
The module postponed to another car works. The superior pressure sensor also works.
Help because I'm stuck.

To start with, fuses, relay, etc.

Do the fans start or silence?
If the pressure sensor is 3-pin, the pressure should be visible in the motor controllers.

Problem solved. The reason was the burned contact on the fuse at the battery supplying the thermal switch for the fans and supplying 12V to pin 7. The 12V power supply was, but when the fans should turn on, it disappeared under load. Thank you grala1 - for directing. A moment earlier in the forum was a similar topic and gave me some food for thought. I close.

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