Go directly to: JCI Diagnostics Menu JCI Test Screen Scripts Linux CPU/MEM/VIP Perf Monitor
The HMI (Human-Machine Interface) Multimedia Commander panel is designed to be operated entirely by feel (once you get used to it), to control all of the functions of the infotainment and connectivity system and the intuitive “joystick” knob can be moved left/right/forward/back and rotated clockwise/counterclockwise – to navigate through the menus, scroll through lists and zoom in/out on the maps.
It becomes quite apparent that the decision as to where to place the Commander panel was made in Japan, which is right-hand drive (RHD), as resting your arm in the LHD configuration will probably result in your inadvertently pressing down on the Commander knob, which selects the current highlighted option, and can get somewhat annoying. As for the other 6 dedicated Commander buttons…
Buttons surrounding the multimedia commander knob:
- Entertainment
– short-press to access the audio menu - Home
– short-press to return to the main menu screen - Navigation
– short-press to access map surrounding current location and navigation menu
(if navigation is not enabled, a GPS location screen with compass will be displayed)
– long-press to repeat the most recent audio guidance instructions - Volume
– Turn to adjust volume; Nav volume is independent of Entertainment volume and can also be adjusted with the volume knob (while she’s speaking instructions)
– short-press down to mute Entertainment audio; does not effect Navigation audio - Favorites
– access your stored favorites:
up to 50 AM & FM radio stations
up to 50 contacts from your phone (if paired and downloaded)
up to 50 navigation points (if navigation is enabled)
– long-press to store particular items as favorites - Back
– short-press returns to previous screen
Also note that if you ever want to reboot the system, simply push both the Mute + Nav buttons for 10 seconds.
In addition to the Commander panel, there are 7 other buttons that interface with Infotainment system, located on the left side of the steering wheel.
- A short tap of Button [1] is the Bluetooth Make Call
- A short tap of Button [2] is the Bluetooth End Call
- Pressing the Talk button [center portion of 3] allows you to input a voice control command, however by pressing it again, you can skip the voice guidance response and speak the next command
- Pressing the Volume buttons [upper (+) and lower (-) portions of 3] functions the same as the Commander volume control
- In Radio mode, a short tap of the Seek* buttons [upper (⇒) and lower (⇐) portions of 4] will take you the Next/Previous favorite radio station in the programmed order, whereas long presses of the same buttons will seek to the Next/Previous playable radio station in the current AM/FM band. When playing streaming audio, a short tap of these same buttons will serve as Next/Previous/Restart, whereas long presses will serve as Fast Forward/Rewind
- The eighth button [Info, center portion of 4] doesn’t interface with the Infotainment Center, but instead toggles various functions within the small digital display to the left of the tachometer
* Seek Switch
AM/FM radio
Press the seek switch 
, 
. The radio switches to the next/previous stored station in the order that it was stored.
Press and hold the seek switch , to seek all usable stations at a higher or lower frequency whether programmed or not.
Radio stations which have been previously stored in the Favorites auto memory tuning can be called up by pressing the seek switch , while any radio station stored in the auto memory tuning is being received. Radio stations can be called up in the order they were stored with each press of the switch , .
USB Audio/Bluetooth® Audio
Press the seek switch to skip forward to the beginning of the next track.
Press the seek switch within a few seconds after playback begins to track down to the beginning of the previous track.
Press the seek switch after a few seconds have elapsed to start playback from the beginning of the current track.
Press and hold the seek switch , to continuously switch the tracks up or down.
Pandora®/Aha™/Stitcher™ Radio
Press the seek switch to skip forward to the beginning of the next track.
Press and hold the seek switch to evaluate the playback of the current song as “Like”.
Press and hold the seek switch to evaluate the playback of the current song as “Dislike”.
Hidden Commander shortcuts
The menus that your dealership technicians access to diagnose your Infotainment system or to update the system’s firmware, can also be invoked with the Commander buttons, however I suggest all you do is just scroll through seeing what all the options are without actually selecting them, especially those noted “Do not operate because item is for manufacturer use”, as you can brick the system if you mess around with these options.
JCI Diagnostics Menu <#diag>
Method 1: Press + hold Music + Favorites + Mute until the Diagnostics menu comes up.
Method 2: In Display Settings screen, press + hold the time readout (top-right corner) until a beep is heard, then press + hold the Home icon (top-left corner) until another beep and the Diagnostics menu comes up.
Ignition should be ON, rather than in ACC mode, for most of these routines.
You can use the Commander knob to scroll through all the different options, each described below:
Diagnostic Assist Screens
(sourced from document SH13429); see online manual for more details; runs program located in the jci/testdiag folder
DTC = Diagnostic Trouble Codes
| No. | Center display (diagnostic content) | Content/function | |
| 01 | CD Test | CD player inspection | |
| 02 | Clear DTC | Clear all DTCs (should read/review codes first) | |
| 03 | Read AV DTC | Inspection of ALL DTCs related to Audio / Video | |
| 04 | Read CMU DTC | DTC inspection for connectivity master unit (CMU) | |
| 05 | Read TAU DTC | DTC inspection for tuner and amp unit (TAU) | |
| 06 | Read CD DTC | DTC inspection for CD player | |
| 07 | Read DTV DTC | Does not operate due to unavailability of applicable DTC. | |
| 08 | Software Reset AVC | Do not operate because item is for manufacturer use. | |
| 09 | Software Version Display (CD) | Software version verification | |
| 10 | Part Number Readout CD/DVD | Part number verification | |
| 11 – 19 (must be in Test mode to select) |
Test Screen Scripts² | 11 = Predefined Scripts Test Screen; no longer available in 56+ firmware, w/o tweak | |
| 21 | DVD Test Mode Enable | Do not operate because item is for manufacturer use. | |
| 22 | DVD Test Mode Disable | Do not operate because item is for manufacturer use. | |
| 24 | Vehicle Data Transfer | Do not operate because item is for manufacturer use. | |
| 25 | Antenna Continuity Status | Antenna control output condition inspection | |
| 26 | DTV Test Mode ON | Do not operate because item is for manufacturer use. | |
| 27 | DTV Test Mode OFF | Do not operate because item is for manufacturer use. | |
| 28 | HD Certification AM (Main Tuner) | Do not operate because item is for manufacturer use. | |
| 53 | Software Version Display (CMU) | Software version verification | |
| 57 | Software Version Display (VIP) | Software version verification | |
| 58 | Vehicle Info | Configuration information verification | |
| 59 | CMU Serial Number Readout | Individual number verification | |
| 61 | Vehicle Signal (Unit Status) | Vehicle signal verification | |
| 65 | Commander and Switch Check | Switch inspection | |
| 68 | Software version display (TFT Display) | Software version verification | |
| 69 | Software version display (Touch Panel) | Software version verification | |
| 70 | Display Check | Display/touch panel inspection | |
| 72 | GPS Data | GPS information verification | |
| 84 | Maker code Display TAU | Manufacturer verification | |
| 85 | Part Number Readout TAU | Part number verification | |
| 86 | Radio Test Mode AM (Main) | Do not operate because item is for manufacturer use. | |
| 87 | HD Certification FM (Main Tuner) | Do not operate because item is for manufacturer use. | |
| 88 | HD Certification FM (Sub Tuner) | Do not operate because item is for manufacturer use. | |
| 89 | XM Certification | Do not operate because item is for manufacturer use. | |
| 90 | AM Reception Sensitivity Level Test | Radio reception condition inspection | |
| 91 | Radio Test Mode FM (Main) | Do not operate because item is for manufacturer use. | |
| 92 | Radio Test Mode FM (Sub) | Do not operate because item is for manufacturer use. | |
| 93 | Software Version Display (TAU) | Software version verification | |
| 94 | Speaker Cyclic Test (FM) | Speaker Inspection | |
| 95 | Vehicle Info Display (TAU) | Do not operate because item is for manufacturer use. | |
| 96 | XM Serial Number | Do not operate because it is displayed, but, not function. | |
| 97 | Radio Electric Field Strength (AM) | Do not operate because item is for manufacturer use. | |
| 98 | Radio Electric Field Strength (FM) | Do not operate because item is for manufacturer use. | |
| 99 | Firmware Update | You need to have the new .UP files on USB drive, and follow procedures very carefully. | |
¹ JCI Test Screen Scripts<#test> [updated 12/12/2018]
Firmware after ≈ v56.00.511 disabled the “Easter Egg” used to gain access to Test Mode from the Diagnostics Menu screen (holding the delete button for 15 seconds), but I’ve written a tweak that adds a T/M button to the screen, which will trigger Test Mode, and allow you to gain access to 9 test mode screens – Options 11 through 19. Option 11, results in a set of JCI Test scripts screens with buttons linked to various scripts that are located in the jci/scripts folder…
- HDCP TOGGLE → runs set_hdcp_config.sh; enable/disable HDCP, region dependent. (High-bandwidth Digital Content Protection (HDCP) is a system designed to protect digital content. The technology is intended to protect unauthorized duplication of high definition (HD) video and audio as it travels across connections)
- LVDS SPEED TOGGLE → runs set_lvds_speed_restriction_config.sh; Enable detailed touchscreen input while driving (like input of route destination address)
- SPEED TOGGLE → runs set_speed_restriction_config.sh; Reverse other speed restricted items, besides detailed touchscreen input including: Unable to alter some settings / Bluetooth devices can be paired only when the vehicle is parked / Disable viewing of Text messages; the system will only read the message to you / Disable responding to Text messages with the predefined short answers
- DEV MODE TOGGLE → runs developer_mode.sh
- CPU GAUGE TOGGLE² → runs jci-cpugauge.sh; CPU usage rate can be displayed.
- DISPLAY TOGGLE → runs set_display_config.sh; DO NOT TOUCH THIS OPTION – Will deactivate display screen (Black Screen); I have published a tweak to resolve this, just in case
- RESET MAP → runs resetmap
- RESET VIP → runs resetvip
- USB DRIVER → runs usb_drivers.sh : add to kernel all usb drivers (hid, usbhid, sound, midi, audio, keyboard) use before using Terminal
- TAUSIM TOGGLE → runs jci-tausim.sh; sets TAU simulation to on or off
- TERMINAL → runs run-terminal.sh : run an in-vehicle infotainment (IVI) Wayland’s Weston terminal with keyboard map defined in /usr/share/wayland/evdev-pc105-us.xkm and accessed by USB-hid plugged keyboard and mouse Plug in USB keyboard and use Terminal screen on CMU display
- WIFI AP TOGGLE → runs jci-wifiap.sh : creates an open access point (with no password) which SSID is named CMU-XX:XX:XX:XX:XX:XX (MAC address) on interface wlan0 192.168.53.1/24 [serving dhcp *.20 to *.254] and also on eth0 192.168.0.1/24 [serving dhcp *.20 to *.254] will enable WiFi; Using winscp or similar connect to 192.168.53.1, / root, / jci
- USER TTY TOGGLE → runs jci-log.sh :start a syslog daemon, can also send to a remote syslog client
- * .vcf FILE TOGGLE → ?
- DeIBDSFiles TOGGLE → ?
- NNG DEBUG TOGGLE → runs set_nng_debug.sh; turns on or off the logging of the socket communication between CMU and NNG as NNG sees the data. Information is logged in /data/save/profiles/01
- TBD → To Be Defined (not set, unimplemented function)
- TBD → To Be Defined (not set, unimplemented function)
² Linux CPU/MEM/VIP Performance Monitor <#perf>
For those wanting to view a performance monitor (to observe memory usage) while experimenting, press and hold Music + Back + Mute until the 3-color bar overlay comes up in the right corner of your screen. You can then operate your Infotainment system and monitor each function’s effect on CPU load, memory (and I think VIP is Virtual IP throughput?) with either:
- that small overlay
- or by tapping the overlay, bringing up a semi-transparent full-screen view of the Linux Performance Monitor
It is temporary function, so the performance monitors will disappear at the next reboot, which can be invoked with press and hold of Nav + Mute.
Screenshot
Press Back + Fav to save screenshots (not sure where they are saved in the CMU though). I recommend using the dataretrieval script instead, which collects screenshots on the USB drive used to run the script.
Reboot CMU
Press & Hold: Nav + Mute for 10 seconds.
If you have any good tidbits to add to this, leave a comment. I’m hoping that there might be some other unknown functions and “Easter Eggs” for these buttons using long presses, etc. I stumbled on the radio station scan function quite by accident 😉
21ˢᵗ Century Fiat / Abarth 124 Spider 