User Manual

8
OBD II 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 UP/DOWN scroll button to select
OBDII/EOBD from the Main Screen.
6) Press the OK button to wait for the Menu to appear. With the embedded
AutoVIN technology in the tool, a sequence of messages displaying the
OBDII protocols will be observed on the display until the test vehicle’s
protocol is detected. The test vehicle information will display as below
once it is done. Press OK to continue.
Figure 3-1 Sample Vehicle Info Screen
 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;