Autel Autolink AL609 - Manual (Page 32)

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5. OBDII Diagnosis
The OBD II Diagnostics function is a fast-access option that allows
you to carry out a quick test on the engine system of OBD II
vehicles.
When more than one vehicle control module is detected by the
scan tool, you will be prompted to select the module where the
data may be retrieved. The most often to be selected are the
Power-train Control Module [PCM] and Transmission Control
Module [TCM].
CAUTION: Don’t connect or disconnect any test equipment
with ignition on or engine running.
1） Turn the ignition off.
2） Locate the vehicle‟s 16-pin Data Link Connector (DLC).
3） Plug the scan tool cable connector into the vehicle‟s DLC.
4） Turn the ignition on. Engine can be off or running.
5） Turn on the scan tool. Select OBDII on Main Screen. (Figure
3.1)
6） Press the OK button to wait for the Menu to appear. A sequence
of messages displaying the OBDII protocols will be observed
on the display until the vehicle protocol is detected.
 If the scan tool fails to communicate with the vehicle’s ECU
more than three times, a “LINKING ERROR!” message
shows up on the display. In this case you need to do the
followings to check up:
 Verify whether or not the ignition is ON.
 Check if the scan tool‟s OBD II connector is securely connected
to the vehicle‟s DLC.
 Verify if the vehicle is OBDII compliant.