Slava

Thanks to all guys, I solved the problem. First of all, personal and huge thanks to you, @Wino. Schemes do the trick: The fuel pump relay is not the only one who controls the pump. Another relay (called also Simos control unit relay). So that another relay (number 429) is the one who does that first initial start of the pump. And it works not stable. Changing that relay solves the problem. Thank you very very much. If you can - please mark the topic as "solver" or "resolved"

The most strange thing: If I add contact negative ( earth ) signal on ECU PIN 26 ( negative wire for fuel pump relay) just only when the starter is working - and then release it as it is (without additional negative supply on that wire) - everything works perfect. What the hell is going on with this car?

So, What I have for today: Checking wires, I found that the Hall sensor (page 2/9, element G40) must have +5V on black-white wire. While red-blue one with "-". I double-checked it in different states (with ignition, without, with engine started) - both have "-". I checked wires for cut - everything looks good. How I check it: - I put multimeter PIN red to black-white, PIN black to red-blue - no any voltage. - I put multimeter PIN red to black-white, PIN black to accumulator "+" - and see "almost -6v", which means that there is a voltage there. Is that correct approach? I also checked same with another ECU, but there is an issue with immobilizer with it. So, I can't start engine with it, but the parameters are same - no +5V on G40. Are these steps correct? thanks

many thanks all of you guys. I've got how to read those numbers - thanks Wino. So, right now I started from beginning as planned. Will keep you updated.

What that bottom values mean? here is 57, 58, 59 etc... ? And another question - you wired numbers like 68 and 59. I'm assuming that this is just an example, and I have to ignore numbers, because in real situation the 59 number will be connected to 59 and 68 will be connected to 68, right?

Ok. I got it. It's a 'reference' - which means, somewhere later I can find same value and it will mean that fuel pump relay link #36 wired with this one. right?

Ok. I bought those materials, and I think it would be easier to start from beginning. Today Im going to reset all codes once again, and using multimeter and those schemas I would like to start from relay, checking sensors (is there supply oprovided), and I'll try to check the resistance of those sensors. Maybe I will find something. One more question - could you please share description, how to read schemas? for example, I can't understand, what those numbers mean, for example, for fuel pump relay scheme - yellow-black wire described as '85' which is number of relay contact, then I see '6' exact in same place (no idea what does it mean), then I see 0.5 in the middle of this wire - which is the size of the wire I think, and then I see '36' in some borders like square. Looks like this is the PIN nub,er of ECU, but I'm not sure.

please share a link.

Could you please share electrical schemes for my car please?

What do you think - could it be just immobilizer issue? . I mean generally - could immobilizer blocks all of that supply?

Hi. So, today I tried to check other sensors around the engine - found one (probably, temperature sensor, with brown and white wires), it has just 0.6V when I start the engine. Is that ok? 2 PIN connector - brown and white.

Thank you for your time. Waiting for your findings. I don't have any schemes, any documentation or anything that might help me at the moment.

So it really looks like that the ECU decides not to go to ignition state: no supply on cam sensor, no supply to fuel pump relay.

Yep. 64 pin has connection to white-black +5V pin on sensor. And 54 pin GROUND has connection to blue-brown, but the blue-brown is wired with few brown wires inside the trunk, so it joined with just brown, which comes to 54. Is that a factory-connection? Or additional wiring by other guys? Not sure. Anyway, the connection is present, but there is no supply on sensor. Could it be some immobilizer issue?

I can't upload files anymore. but this might be what we are looking for: CHFA LNR