[Solved] BMW E46 316i 1999 - After the battery is replaced, the central locking system do

Hello!
I have two keys for a car of this type:

Some time ago, I wanted to replace one battery, because its operating range (opening the car) was very short and the battery (accumulator) gave signs of wear. After replacing the battery, I programmed both keys as the manual says and it turned out that the central lock does not respond to this key with the replaced battery and the car runs without any problem on it. Multiple programming has not helped. I suspect that the central lock is connected to a separate alarm module, because the car has some alarm output and under the hood sits such a standard mermaid:

In the previous car, the alarm control panel was pressed under the steering column. I undressed all the covers under the steering wheel, undressed the entire passenger compartment, and nothing was found beyond the standard BMW components (EWS, relay box). Interestingly, when I close the car by inserting the blade into the lock, the alarm goes into standby mode. And as I open this way, the locks will be unlocked and the alarm starts to go to the booth and I will not remove it with the button on the key.
Question:
Is it possible that I need to program this key somewhere besides the immobilizer, in other words in the alarm control unit?
Where else can this control unit be stuck? Finding along the cord from the mermaid does not give anything, because he dies in the channel with other wires under the hood.
Thanks in advance for your help, because the second key would come in handy.

Chupacabra wrote:

I wanted to replace it with one battery

Start by checking if the remote control emits radio waves after replacing the battery.

When you program it in immo, you have to press a sequence of keys, which is confirmed by the car. And from here I assume that the remote control emits a signal.
[Quote from the network]
1. Go to samocruv and close the door
2. Insert the ignition key and turn it to position No. 1 (the AIRBAG indicator lights up) max. 5 sec. and remove the key back
3. Press and hold the opening button. Without releasing this button, press the button briefly, three times within 10 seconds
4. Release the opening button if the attempt is successful, the central will close and open immediately.

In the absence of a central locking reaction, the pilot must be re-initialized.
If you have other keys with a remote control (a total of 4 items for this car !!), you must also initialize them, each within 30 seconds after the previous one.
[End quote]
Whether I program it first or second, there is always a reaction.

Chupacabra wrote:

there is always a reaction

What reaction?

Chupacabra wrote:

4. Release the opening button if the attempt is successful, the central will close and open immediately.

This is the only reaction the instruction assumes.

Well, that's what's happening. And then the central one does not respond to any of the buttons.

I tried the home methods described here on the forum to check if the pilot sows and I have doubts. I will try it somehow to check and I will be able to know it 100% sure. I am just wondering that it is programmable and a reaction to the buttons is needed.

I had a moment to bury. The pilot seems not to sow. I wonder if I did not hurt him by exchanging the original 3.0V battery for the portal 3.6V. I have 4.0V on the power supply, measuring it with a meter. This 1.0V too much could probably do.

I used to play with a laptop with the INPA program today and the situation is as follows: Both keys can be programmed easily, both keys and their numbers are visible through the EWS and with both keys the car drops out without any error. Well, unfortunately, what I would not do is the car does not react to closing / opening of this key with the replaced battery (except for the only situation where after programming the key central locking confirms the correctness of the procedure).
I read somewhere that the keys can also be programmed separately for the comfort module. Is it true?

Hello.
He is struggling with the same problem. The car does not respond to the key. You can open the door with the arrowhead but with a zero reaction button. I replaced the battery in the remote control yesterday because the old one was already working only after approaching the door and last week it stopped working completely. The car fires. I also tried to code or adapt the key by putting it in the ignition and then pressing the buttons as everyone recommends. Nothing gives zero reaction. The central lock still does not react. I was looking for answers in other forums but nobody knows anything. I have only one key for this car. I did not damage the tiles when cutting the housing (I looked closely). Can anyone remedy this?

And he could be programmed normally?

I can not initiate this key. I sat today after work for half an hour under the block, getting on and off, repeating the whole procedure over and over again to boredom. The buttons do not react anymore. It crossed my mind to go to the masters from BMW but recently I left 4100 PLN for them. Probably I would not know the problem anyway. The battery that I soldered has a rated voltage of 3.6V so I wonder if this is not a problem but if you post previous posts, it probably does not matter.

Go to the key manager and check if the key is suitable.

And in my case the key reacts to programming, immo recognizes its code, the engine can be started and the buttons after programming become dead. I wanted to replace the battery in the second one, but I'm afraid it will be the same.

Chupacabra wrote:

And in my case the key reacts to programming, immo recognizes its code, the engine can be started and the buttons after programming become dead. I wanted to replace the battery in the second one, but I'm afraid it will be the same.

Immo and the remote control cz are two different circuits in the remote control.

I know that. But when programming the remote control you use a sequence of buttons. The car responds to you by clicking the central button. And with me the whole procedure goes perfectly and then meatball. As if the comfort module did not see / recognize the key.

As a result of the immo fault, the entire set with the key was replaced. The new key works + one old one.