How to turn on modem diagnostic mode on Samsung Galaxy Nexus

I am trying run xgoldmon utility with my old Samsung Galaxy Nexus. I follow instructions provided in README file. > The Galaxy Nexus has to be rooted first to activate diag mode! Then: > - In the adb shell, as root, enter: echo MODEM > /sys/devices/tuna_otg/usb_sel > - Connect to the first of the serial devices (e.g. /dev/ttyACM0) with a terminal emulator and enter AT+TRACE=1 I tryied with several factory images for Samsung Galaxy Nexus ("yakju" for Galaxy Nexus "maguro" (GSM/HSPA+)) from the Google site . I flashed Android 4.0.4 (IMM76I), rooted phone via TWRP installng SuperSU , connected to the phone via running adb shell and run echo MODEM > /sys/devices/tuna_otg/usb_sel Phone became disconnected and I did not see ttyACM* devices in /dev directory to enter AT commands. Also I could not connect with the adb tool. When I did echo NONE > /sys/devices/tuna_otg/usb_sel I could connect to my phone with adb tool. I tried the same things with 4.3 (JWR66Y) and got the same result. There are several hardware versions of Samsung Galaxy Nexus, I suppose, but not sure, that I have a version that did not allow to work with modem diagnostic mode. Can somebody say what I am doing wrong? And is there any solution to my problem?