18
19
Operating Error
If the scan tool freezes, then an exception occurs or the vehicle
,
s ECU
(Engine Control Unit) is too slow to respond to requests. You need to
do the following to reset the tool:
Scan Tool doesn
,
t power up
If the scan tool won
,
t power up or operstes incorrectly in any other
way, you need to do the following to check up:
Press and hold the
and
buttons simultaneously for at least 3
seconds to reset the scan tool.
Turn the ignition off and wait for about 10 seconds. Turn the
ignition back to on and continue the testing.
Y
N
Check if the scan tool
,
s OBD II connector is securely connected to
the vehicle
,
s DLC;
Check if the DLC pins are bent or broken. Clean the DLC pins if
necessary.
Check vehicle battery to make sure it is still good with at least 8.0
volts.
4. OBD II Diagnostics
4.1 Reading Codes
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: Do
n
,
t co
nn
e
n
ct or disco
nn
ect
an
y test eq
u
ipme
n
t with
ig
n
itio
n
o
n
or e
n
gi
n
e r
unn
i
n
g.
1) Turn the ignition off.
2) Locate the vehicle
,
s 16-pin Data Link Connector (DLC).
3) Plug into the scan tool cable connector to the vehicle
,
s DLC.
4) Turn the ignition on. Engine can be off or running.
5) Press the
button to enter the
. Use the
scroll buttons to select
from the menu.
Y
Main Menu
UP/DOWN
Diagnostics
Reading Codes can be done with the key on engine off (KOEO) or
with the key on engine running (KOER).
Stored Codes are also known as
hard codes
or
permanent
codes . These codes cause the control module to illuminate the
malfunction indicator lamp ( MIL ) when emission-related fault
occurs.
Pending Codes are also referred to as
maturing codes
or
continuous monitor codes . They indicate problems that the
control module has detected during the current or last driving
cycle but are not considered serious yet. Pending Codes will not
turn on the malfunction indicator lamp (MIL). If the fault does not
occur within a certain number of warm-up cycles, the code clears
from memory.
