Autel Autolink AL619 Manual page 20

If the scan tool freezes, then an exception occurs or the vehicle's
ECU (Engine Control Unit) is too slow to respond to requests. You
need to do the following to reset the tool:
 Reset the scan tool.
 Turn the ignition off and wait for about 10 seconds. Turn the
ignition back to on and continue the testing.
Scan tool doesn't power up
If the scan tool won't power up or operates incorrectly in any other
way, you need to do the following to check up:
 Check if the scan tool's OBD II connector is securely connected
to the vehicle's DLC;
 Check if the DLC pins are bent or broken. Clean the DLC pins if
necessary.
 Check vehicle battery to make sure it is still good with at least 8.0
volts.
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