Chevrolet/GMC
FULL SIZE TRUCK
20/20
Troubleshooting Guide Continued
Symptom
Possible Cause
Remedy
5
iDatalink website says serial
number is invalid.
Incorrect serial number is being
used.
In the i209-GM settings confirm the serial
number. MENU/SETUP/GENERAL/ABOUT.
Serial number may not be in
iDatalink database.
Call ADS at 1-866-427-2999 and verify.
6
Headunit will not turn on.
Incorrect serial number was used
when flashing maestro.
Flash Maestro with correct serial number.
4 pin Maestro data cable is
disconnected or damaged.
Check for proper connection or
disconnected pins.
OBD2 cable is not plugged in.
Connect OBD2 connector to the OBD2 port.
Monitor, key-harness or main
harness are not connected.
Check for proper connection or
disconnected pins.
7
Cannot enter SETTINGS
MENU.
Vehicle is in motion or parking
brake is not engaged.
With vehicle in (P)PARK engage the parking
brake. Release the parking brake and
engage the parking brake a second time.
8
The Factory Onstar Voice
Recognition system is too
sensitive.
When you press the Onstar button
on the mirror, noises in the vehicle
may be recognized as voice
commands. In addition radio key
presses may also be recognized as
voice commands while the Onstar
is active.
Set the KEY BEEP TO “0” in radio settings
menu.
9
On the climate screen, the
power, recirculate, Rear
Defroster, Front Defroster and
AC buttons do nothing when
pressed.
This is normal.
These are only status icons. They are not
buttons. They will turn yellow when selected.
10
Cannot control the DVD
Player properly.
DVD has not been set on the
SETUP menu.
Ensure DVD is ON in HDMI SETUP menu.
HDMI box has not been set on the
SETUP menu.
Ensure DVD is ON in HDMI SETUP menu and
remote loop was cut on the wire harness.
11
Sound mutes when vehicle is
shifted into reverse.
Mute on reverse is turned on in the
SOUND menu.
Change Mute on reverse to off.
12
Only the front speakers are on
for SXM Radio.
SXM Tuner has not been activated.
Activate SXM Tuner.
13
The vehicle is incorrectly
positioned on the Navigation
display.
Poor GPS signal.
Ensure the recommeded GPS antenna route
was used. See page 11.
14
CarPlay/ Android Auto map
positioning issues.
GPS antenna is positioned
incorrectly.
GPS antenna is obstructed and doesn’t have
line of sight to the sky. Perform a factory
reset. The unit will automatically recalibrate.
15
iPhone or Android phone is not
recognized
when connected to the
USB cable.
Loose or disconnected USB cable.
Check the USB connection behind
the headunit.
Non-compatible cable.
Use the cable supplied with the
iPhone or Android phone. Third party adapters
and long extensions may not work. Only use
USB extension that came with the head unit.
Dirty charging port on phone.
Clean charging port.
