Autel Autolink AL319 - Manual (Page 37)

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 Take the vehicle to a professional to have it serviced. The
problem(s) causing the red LED to light must be repaired
before the vehicle is ready for an Emissions Test.
Audio Tone Interpretation
The audio tone is configured according to the I/M Readiness Status.
This function is invaluable when performing diagnostics and driving
at the same time, or working in bright areas where LED illumination
alone is not sufficient.
Different audio tone with different LED light indicates different I/M
Readiness Status.
LED Light Audio Tone Beep Interval
Green LED Two long beeps 5 seconds
Yellow LED short, long, short beep 5 seconds
Red LED Four short beeps 5 seconds
After you have read the information, press ENTER/Exit to exit. The
other buttons are disabled to prevent misoperation.
B. Retrieve I/M Readiness status in typical way
1) Use the SCROLL button to select I/M Readiness from
Diagnostic Menu and press ENTER/Exit button. (Figure 4.3)
2) Wait a few seconds while the scan tool validates the PID MAP.
3) If the vehicle supports both types of tests, then both types will be
shown on the screen for selection.