Hello,
I don’t find any reason for my problem.
I converted my black to v3 and restored the factory settings, plugged in the minimum number of pins.
I communicate well with the EMU but it beeps constantly, with the internal buzzer. I have the same problem if I revert to version 2. The beeping only stops during the flash from v2 to v3, or v3 to v2.
It’s no longer under warranty, but I can open it if necessary.
Where can my problem come from?
Thank you
Ecu
Check ecu Ground and both 12V supply
The positive terminal is at 12.5V (B13 + G18) and the ground (B27, G17, G24) is connected to the negative terminal of the regulated power supply.
I can communicate successfully with the EMU (using headphones 
).
Did you connect B28 (ECU ground) ?
No, it’s not mentioned in the manual. The beep occurs when I connect the ignition (G18).
If only B13, B27, G17, and G24 are connected, I don’t get any sound, but communication isn’t possible either (which makes sense).
Thanks Jadzwin, I’ll try it on Friday.
Here is a sample wiring diagram for 4 cylinder engine:
What do you connect g18 to?
Are you Bench testing?
When I want to turn on the EMU, at +12v, the same as the power supply. Without G18, I don’t have a beep, but I don’t have communication.
Yes, it’s outside the vehicle, with nothing else.
B28 is required. What is the name of the document you have presented ? It is not correct and we need to update it.
On this page Ecumaster EMU BLACK
This file : https://www.ecumaster.com/files/EMU_BLACK/EMU_BLACK_manual.pdf
We have already corrected the document. Thank you for reporting this.
Due to minor differences between EMU Black hardware revisions, some devices worked correctly in a minimal configuration without the B28 pin connected. The manual now clearly states that the B28 pin must be connected.
great.
I tested it now, everything is good, no more beeps with the right soil.
Thx
