Autel Autolink AL319 - Manual (Page 11)

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3. Using the Scan Tool
3.1 Tool Description
① OBD II CONNECTOR – Connects the scan tool to the
vehicle‟s Data Link Connector (DLC).
② LCD DISPLAY – Indicates test results.
③
GREEN LED – Indicates that engine systems are running
normally (The number of monitors on the vehicle which are
active and performing their diagnostic testing is in the allowed
limit, and no DTCs are present).