Interface Diagram for BRC Sequent 24 LPG Installation: Programmer Guide & Assistance

I am looking for an interface diagram (programmer) for the BRC SEQUENT 24 installation. Thank you in advance for your help. I can repay you for the help I provided.
cieknd(_at_)wp.pl

Hi, did you find anything?

gentlemen, did you find a schematic of this interface?

Unfortunately not. but I have already purchased a USB-ready interface that works without any problems. If someone would like to, I can give the seller information.

Macieknd wrote:

Unfortunately not. but I have already purchased a USB-ready interface that works without any problems. If someone would like to, I can give the seller information.

congratulations, worth praising that there are still those who can do something - go and buy ready. next time, tell me that you have bought a complete car.

Moderated By robokop:

Congratulations, this post is ineffective, a warning.

Diagram of a working interface under RS232:


The diagram has an error - the emitter of the transistor Q2 should be connected to the ground, not to the power supply.
The circuit is checked, it connects. I have additionally inserted optical transmission signaling in the form of a double LED.
It cost me PLN 4 (MAX 232 price), and the execution time was 2-3 hours.

At the request of RAFALPG, I present a diagram with marked changes - red.

I am looking for a schematic diagram for the BRC SEQUENT 24 56 P&D lpg interface on the USB connector.

Has anyone seen or anyone knows?

You simply add a usb adapter to this rs interface.

hello I made this interface and checked on seqent 24 and others ...
I'm not working with the sequent 24.11 installation from 2012,
anyone knows which program to use to work / maybe pl version /

ps. I hope this interface works and I did not make a mistake

Gentlemen, I bought a used BRC Sequent interface on OLX, which is supposed to work with BRC P&D that I have installed in my car. first I updated the FTDI drivers from 2.8 to 2.12. After connecting the interface to the PC in the manager, the USB Serial Port (COM18) appears in the ports, i.e. in the P&D program in the Tools / Communication tab, COM 18 should be set?
So I did, set different speeds in the P&D program with no luck. In the COM18 port settings, I also changed the speeds and still no communication.
Maybe someone from the screenshots below will find what is wrong with me, that I can't connect.





Now the interface itself lights up red after connecting to the PC. This is what it looks like inside, can any of you say whether the wires to the switchboard plug are soldered in the right order?




In the photo below I have marked what color of the wires is soldered to a given place on the board and the colors in the plug.






Is the whole contraption at all composed of the appropriate components?

bubu1769 wrote:

You simply add a usb adapter to this rs interface.

Just solder like this:



and find drivers?

Do you need to install any more system?

I soldered the circuit (my first in my life) and checking with the meter whether everything is ok, it turned out that on the 2 max pin, in front of the c2 capacitor (on its +) I have GND .... "doublecheck" and it should be like that?

I meant such an adapter

usually it is on the PL2303 chip.

Digging through the old cutlet ...
If I have an OBD2 diagnostic cable on ELM327, can I use it to connect to sequent24?

Not. This is a completely different wire.

It seems to be completely different, but it still has a K line ...
Three wires are needed for BRC: + 12V, ground and K line. All these points have the OBD2 cable I mentioned.

But it supports other communication protocols and is detected differently by the system.

There's a way with a vag cable
red power, black ground, blue line k

and how to do vag cable already on the forum

And normally the program connects through it?

yes (I do not remember if the drivers had to be changed, but I think they were the ones that Windows update downloaded), I tested how I changed the control unit (if you need to check something, you do not need to buy a cable), but anyway, I recommend buying a dedicated interface, they are not expensive (it comes about the length of the cable and USB power supply, when it comes to sharpen the map, a non-combined cable causes less problems)

In that case, I am reverting my previous statement.

Buddy djr2, which pins in the OBD plug do you connect the power supply and signal to?

4.5: mass, 16: + 12v, 7: linia k.

I did as described above and it works
So if someone has an OBD diagnostic cable, it can be used for BRC Sequent24

But on ELM327 or VAG KKL?

On ELM327 it does not work. I did it on the cheapest universal cable that supports older cars with OBD1