Operator's Guide

Diagnostics & Trouble Shooting
Before going through the checklist, check wiring connection.
If any of the problems persist after checklist has been made,
consult your nearest service dealer.
Symptoms Cause Solution
No power. The car ignition switch is
not on.
If the power supply is
connected to the car
accessory circuits, but the
engine is not moving, switch
the ignition key to “ACC”.
No sound. Volume is in minimum or
Wiring is not properly
connected.
Adjust volume to a desired
level or Check wiring con-
nection.
The operation
keys do not work.
The built-in microcomputer
is not operating properly due
to noise.
Press the reset button.
If you have problem or question that wasn’t mentioned above
please visit our website at MBQuart.com and go to the TEQ
Support section or the Frequently asked questions.