Autel Autolink AL539B Manual page 13

YELLOW LED – Indicates there is a possible problem. A
4)
"Pending" DTC is present and/or some of the vehicle's emission
monitors have not run their diagnostic testing.
RED LED – Indicates there is a problem in one or more of
5)
the vehicle's systems. The red LED is also used to show that
DTCs are present. DTCs are shown on the Scan Tool's display.
In this case, the MIL lamp on the vehicle's instrument panel
will light steady on.
ONE-CLICK I/M READINESS KEY – Quick-checks
6)
State Emissions readiness and drive cycle verification.
ESC BUTTON – Cancels a selection (or action) from a
7)
menu or returns to the previous screen.
LEFT SCROLL BUTTON – When look up DTC
8)
definitions, moves to previous character and views additional
information on previous screens if DTC definition covers more
than one screen; deselect all marked PID data when viewing or
recording customized live data list; views previous frames of
recorded data when playing back live data. It is also used to
update DTC library when pressed.
POWER BUTTON – Press and hold for 2 seconds to turn
9)
the scan tool on and off. Press and then release to view ? help
information.
UP SCROLL BUTTON – Moves up through menu and
10)
submenu items in menu mode. When more than one screen of
data is retrieved, moves up through the current screen to the
previous screens for additional data.
OK BUTTON – Confirms a selection (or action) from a
11)
menu.
RIGHT SCROLL BUTTON – When look up DTC
12)
definitions, moves to next character and view additional
information on next screens if DTC definition covers more than
11