User Manual

6. OBD II Diagnostics

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 and

wait for power on.

4） Turn the ignition on. Engine can be off or running.

5） Select OBDII from the Main Screen on the scan tool (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

(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