Autel AUTOLINK AL529 Manual page 24

Operating Error
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.
LED lamps not working
If you turn on the scan tool and perform the I/M Readiness test but the LED
lamps are not working, there may be several possible causes, including bad
connection and ignition off. In this case, follow these steps to check the scan
tool.

Make sure the OBD II cable is connected to the DLC securely.

Verify the ignition key is in the KOER position.

Run the LED Test in the System Setup menu. If the scan tool did not
pass this test, there is a problem with the LED lamp. Please contact Autel
Tech Support or your local selling agent.
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