32
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
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 and
wait for the scan tool to boot up.
4
）
Turn the ignition on. The engine can be off or be running.
5
）
Select
OBDII
from the
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
(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 OBDII compliant.
Turn the ignition off and wait for about 10 seconds. Turn on the
ignition again and repeat the procedure from step 5.
If the “LINKING ERROR” message does not go away, there
might be problems in the scan tool to communicate with the
vehicle. Contact your local distributor or the manufacturer’s
customer service department for assistance.
