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If a recording does not exist in the OBD II
System Testers memory, then the message
No Recording Present, Please Make Record-
ing First will display. The Record Data function
must be performed in order to play back the
data. Press the BACK key to return to the OBD II OBD II Function Menu and select
Record Data to make a recording.
If recorded data exists, the PIDs, Frame
number and Time are displayed.
NOTE: Multiple-response PIDs (see View Data) are displayed with their module
address in one frame and their measurement values in the next frame. Use
the LEFT/RIGHT arrow key to alternate between the frames to identify the PIDs
and their measurement values.
On the Playback Data screen, lines 1-3 are used to display the vehicles PIDs. Use
the UP/DOWN arrow keys to scroll through the PID list. The end of the list is reached
when only the UP arrow is displayed at the right of line 3. The PID list scrolls line-by-
line and will not wrap around to the beginning.
Use the LEFT/RIGHT arrow key to move through the Frame/Time index. Frame 0/
Time 0.0 is the trigger point; where the recording was started by either Manually
Triggering or by Triggering On Codes. Frames -5 to -1 contain data prior to the trigger
point.
NOTE: After reaching the last Frame/Time interval, the system tester will wrap to
the first Frame/Time interval recorded. The Frame/Time display will change
from a positive to the first negative number viewed. This is normal. The LEFT/
RIGHT arrow may be used to scroll through all time intervals.
A Frame is a snapshot of engine operating conditions at a certain time. The
relationship between the Frame index and the Time index are based on the vehicles
on-board computer data rate and the number of PIDs being read. Remember, not all
OBD II vehicles use the same data stream (communication protocol), data rates
(baud) and the same number of PIDs. For this reason, not all vehicles will start and
end with the same Frame number. The Frame number increases every time data is
transmitted from the vehicle to the OBD II System Tester. The intervals when this
occurs increases for slower data rates and larger PID lists. Frame 0 occurs at the
trigger point, Time 0.0. Thus, negative and positive Frame numbers contain data
before and after the trigger point, respectively.
NOTE: Some vehicles will wait 3 to 4 minutes after the driveability problem first occurs
before storing a trouble code in the vehicles on-board computer. If you
selected Trigger On Codes when you made your recording, you might not
see any drastic change in data parameters before and after the trigger point.
In cases like this, it is better to manually trigger the start of the recording when
the driveability symptom is first observed.
When you have finished playing back a recording, press the BACK key to return to
the OBD II Function Menu.
No Recording Present
Please Make
Recording First
MIL Status ON
ABSLT TPS (%) 0.0
CALC LOAD (%) 5.3[
Frame: 10 TM: 9.5