Use and Care Manual

17
4 OBDII 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 Powertrain 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 2- 2).
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 OBDII connector is securely connected to the
vehicle’s DLC.
 Verify that the vehicle is OBDII 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.
7） View a summary of system status (MIL status, DTC counts, Monitor