Autel Autolink AL319 [25/47] Obdii diagnostics

4. OBDII Diagnostics

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. Use the SCROLL button to select

OBDII/EOBD from the Main Screen.(Figure 3.1)

6） Press the ENTER/Exit 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 (Engine Control Unit) more than three times, a

“LINKING ERROR!” message shows up on the display.

 Verify that the ignition is ON;

 Check if the scan tool‟s OBD II connector is securely

connected to the vehicle‟s DLC;

 Verify that the vehicle is OBD2 compliant;

 Turn the ignition off and wait for about 10 seconds. Turn the

ignition back to on and repeat the procedure from step 5.

 If the “LINKING ERROR” message does not go away,

then there might be problems for the scan tool to

communicate with the vehicle. Contact your local

distributor or the manufacturer’s customer service

department for assistance.