Honda Civic VI gen. 2001 - CIVIC - The green key is flashing, the car does not s

I have the following car problem. Honda Civic 2001 i.e. VI gen. The car was driving normally, but after reaching the place and turning it off, it no longer wants to start. A green key flashes on the dashboard. This indicates a problem with the immo.
I used the second black key and no change. I do not have a red key or it was no longer present in this model. After connecting the autocom, there is proper communication with the ECU, but the parameters show the status of no permission to start the engine. So IMMO seems to be blocking it. I took the immo out from under the steering wheel, I could only measure the resistance of the coil surrounding the key - approx. 14 Ohm.
Further searches led me to the ECU where after removing it and dismantling I did not see a vertically soldered immo plate as it used to be in the 5th generation of the model.
The ECU is 37820-PLH-G01.
I noticed that the wires from the cube from the immobilizer go in a common bundle towards the controller, but several of them are not connected to the plugs going directly to the car's controller, but are connected to a gray long cube from which the bundle goes through the bulkhead to the engine.
What else can you check yourself, what installation points to exclude the obvious. How is the key coded in this model and how does the immo box under the steering wheel communicate the start permission signal to the ECU? Is it possible to bypass this system, at least enough to confirm for a moment that the problem is with the immobilizer and start the car?
The starter spins even when I disconnect the immobilizer under the steering wheel, so there is no cut-off for the machine in this model. You can also hear the fuel pump when you turn the ignition on.

The synchro flew or there is no permission from the can for the ecu. So everything is still broken. I think that your mission is over. There is nothing more to check, the fault is found at your fingertips.
It remains to zatargac the car to someone who will do a synchro.

ok, it will probably end like this, I just wanted to eliminate faults such as damage to the installation somewhere on the ECU immo road or somewhere in the engine compartment.

Look for someone with a diagun and a few minutes and you have a synchro.

and only the diagoon? Autocom won't go?

I think you are asking too much from the equipment that costs as much as a few kilos of potatoes.

Apparently so, but I played with the diagun a few times and did not find any outstanding difference in its favor in relation to the autocom. Maybe it supports more old cars and has a wonderful red suitcase with adapters, but the procedures themselves were similar to autocom.
Is there any other interface like HIM/HDS that can do this?

One more thing, aren't there some idiotic pitfalls in this car like going through the coils or anything else in the engine compartment before the signal from the Immo reaches the ECU? Can the flashing green key on the board be only a symptom of lack of synchronization, i.e. key recognition, or can it signal any other Immo fault in the form of power failure or damage to one of the wires. A cube with 7 wires comes to Immo.

Don't you have some sort of secondary alarm or ignition cut-off?

ozi-77 wrote:

Don't you have some sort of secondary alarm or ignition cut-off?

Don't wind the noodles on your ears, the guy is blinking the key on the wardrobe. Synchro flew and that's it. He would have done it inexpensively a long time ago.

Hello
I have a very similar problem with this model. The green light is flashing all the time, but the car starts. Unfortunately, the engine works normally only up to about 2500 rpm and above it cuts off as if there was no air. An additional fault is the lack of communication with the ECU. The situation does not change after unfastening the immo box, the engine starts normally and continues to throttle it.

Anyone got an idea what could have happened?

jokerro wrote:

ozi-77 wrote:

Don't you have some sort of secondary alarm or ignition cut-off?

Don't wind the noodles on your ears, the guy is blinking the key on the wardrobe. Synchro flew and that's it. He would have done it inexpensively a long time ago.

Is synchro in your view the same as recoding immo keys?
What is the concept of inexpensive and do you know anyone in the vicinity of Warsaw or the city itself who could do it?

Added after 1 [minutes]:

robek wrote:

Hello
I have a very similar problem with this model. The green light is flashing all the time, but the car starts. Unfortunately, the engine works normally only up to about 2500 rpm and above it cuts off as if there was no air. An additional fault is the lack of communication with the ECU. The situation does not change after unfastening the immo box, the engine starts normally and continues to throttle it.

Anyone got an idea what could have happened?

How do you manage to start the car after disconnecting the immo box?
After all, without immo, the driver does not get "permission" to start.

osliczka wrote:

How do you manage to start the car after disconnecting the immo box?
After all, without immo, the driver does not get "permission" to start.

well, this is strange, but whether the immo is disconnected or connected, the car fires the same.
The immo coil for me is also about 14 Ohm, so it is likely that it is good for me and for you.
I will add once again that I cannot diagnose the ECU because there is no communication with it, the CHECK indicator is on all the time.

Which exact year of car do you have and with what engine?
Maybe you've already had the immo picked out and hence the effect, or it only signals a defect that allows you to start it. What do you want to connect this honda with? Autocom sees nothing but the current parameters from the engine and the fact that it is not allowed to start the engine from the immobilizer.

robek wrote:

Hello
I have a very similar problem with this model. The green light is flashing all the time, but the car starts. Unfortunately, the engine works normally only up to about 2500 rpm and above it cuts off as if there was no air. An additional fault is the lack of communication with the ECU. The situation does not change after unfastening the immo box, the engine starts normally and continues to throttle it.

Anyone got an idea what could have happened?

Damaged driver. There is a chance that if you disconnect the battery for a long time, it will not start again. The subject is known.

osliczka wrote:

do you know someone in the vicinity of Warsaw or the city itself who could do it?

Look above and read what your friend has in the description, even the phone and it will even arrive.
He'll fly in, do whatever it takes, and after the race.

Hello, I have the same problem with the computer, literally the same. I can't get such a computer with this Plh-G01 designation anywhere. How did you deal with yours?

Added after 9 [minutes]:

I will add that the car has been in the service for two months, nothing can be done with the old computer, it does not accept any software, I even bought another driver with the designation Plh-G02 and it turned out that it does not fit and errors pop up.
I'm also from Warsaw and that's why I'm asking how you dealt with it, who fixed it for you, because I'd love to go there.