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16 - Frequently Asked Questions
Why doesn't the MVCI power on?
Make sure that the MVCI is connected to the vehicle with the DLC cable or connected to the external power adapter. If
the MVCI is connected to a vehicle and the MVCI doesn't turn on, make sure the vehicle's 12V battery has a good state-
of-charge. If the battery is good, make sure the DLC has 12 volts between terminal number 16 and terminal numbers 4
or 5 (they are grounds). If the DLC lacks power or ground, use the external power supply to power the MVCI.
Why doesn't the MVCI power off?
To turn off the MVCI, disconnect it from all power sources then press and hold the ESC button until the screen goes
blank (5 seconds). The MVCI powers off 60 seconds after being disconnected from a vehicle or the external power.
Why does the MVCI power off if I didn't press the ESC button?
The MVCI is not designed to run on its internal batteries. The batteries act as a backup power source in case the MVCI is
accidentally disconnected or loses power. It must be connected to a vehicle or an external power source. The MVCI
powers off after 60 seconds without external power.
Why does the MVCI keep rebooting when the external power is disconnected?
The MVCI batteries are low on power. Connect the external power adapter, and allow the batteries to charge for 4 hours.
Why does the MVCI reboot when the vehicle is started?
The MVCI batteries are low on power. Connect the external power adapter, and allow the batteries to charge for 4 hours.
The screen message is hard to see. What can I do to make it easier to read?
You can make the font larger by pressing and holding the MVCI's right key (>>) for 3 seconds.
Why does the MVCI beep every time the scroll pad is pressed?
This is normal. The beep can be disabled. Refer to the
Beep Menu
for information about enabling and disabling the beep.
When using the menu functions, why does my MVCI return to the MVCI Status display?
The MVCI always returns to the MVCI Status display after 20 seconds without user interaction.
When changing the wireless settings, why do the settings go back to the previous value before they are saved?
The MVCI always returns to the MVCI Status display after 20 seconds of no user interaction. If this happens, all wireless
changes made are lost. All changes must be saved before the MVCI returns to the MVCI Status display.
Why does the battery icon on the MVCI Status screen have an 'X' in it?
The batteries in the MVCI are not installed or they are installed incorrectly, or they are defective.
Why does the battery icon on the MVCI Status screen have a 'ZZ' in it?
Battery charging stops when the MVCI's internal temperature rises above 140°F or 60°C. Battery charging resumes after
the MVCI power is cycled (turned off and on) and the temperature is below 140°F or 60°C.
Can I quickly perform a CM Update on multiple vehicles of the same type?
Yes. When after a CM Update is complete, the screen will prompt asking to repeat this operation on another vehicle.
Refer to
Instructions for Updating Control Modules/Units
for more information.
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