Ok, usually this switch is outside ECM.
You can also check C3 signal T-ECT (or M1), seems like it may be ON/OFF controller

Sprawdziłem te ustawienia, mam dwa pytania: 1. czy wyświetlacz jest podłączony i wyświetla wskazania, czy UKP pracuje w trybie tylko android? Jeśli tylko android to trzeba w ustawienia -> ekrany -> autowygaszanie ustawić autowygaszanie włączone 0s. 2. na wejściu DS-B jest ustawiony czujnik temperatu...

Change signal source from LPG electrovalve, it will be constant +12V/0V

+4.4V is still fine for high state. Are you sure is it +4.4V between measured wire and vehicle ground?
It can not be software controlled, it's hardware input, low state <0.5V and high state >3V, so 4.4V is 100% fine and it should work.

It depends mainly on external circuit, you can have bus conflict (SPI bus is shared, MCU can communicate with FLASH when you power up it). There are some tricks and workarounds. Please read Chapter 5 for more details. If you share me more details about your external circuit how FLASH is located on b...

Udostępnij mi proszę swój plik ustawień UKP.
Na screenie są najnowsze logi po zmianie ustawień?

Are you programming in external circuit?
Please try to increase voltage +0.2-0.3V and decrease SPI speed to 50% or 10%. If it will not work, you need to desolder the chip and programm it directly in WSON8 adapter.

Please check: 1. if you have full range of measurement - disconnect TC+ and TC- and it should display around 1250C. If it's still 6xx C you have problem with to low power supply for EGT-K amplifier which is limiting output 2. please check thermocouple connection if it's not swapped, green should be ...

Could you share datasheet for this chip? I can not google it, maybe chip has crypto registers and datasheet is not publicly available. What READ ID does it report? Have you tried to read it as FLASH -> 25 series -> 25...512 [PP] with 1.8V VPP ? Or FLASH -> 25 series -> Macronix -> MX25U51245G

Niestety nie, domyślnie wyjście zawsze jest rozłączone.
Najlepiej zamienić logikę na wyjściu, tak żeby odłączenie wyjścia (domyślny stan) niczego nie uaktywniało.