View Data - Actron 9640 User Manual

GM Historic (OBD I) Diagnostics

View Data

The View Data function allows the user to view the vehicle Parameter
Identification Data (PIDs) in real time. As the PCM monitors PIDs, they are
simultaneously transmitted to the scan tool. The PIDs are continuously updated
at the PCM's rate.
In addition to reading codes, View Data is the most useful diagnostic function
for isolating the cause of a vehicle operation problem. Viewing data is also used
for observing sensor data and the ON/OFF state of switches, solenoids, and
relays.
View Data can be performed with the ignition key On-Engine Off or Running.
!
WARNING
! WARNING
Select View Data from the GM
Function List and press ENTER. If a
Select Group screen does not appear,
skip the Multiple Group section and
continue.
5
Multiple Group Vehicles
Some vehicles display a Select Group
screen for viewing data. In these cases,
only one group of data can be viewed at
a time.
Select the type of data to view. Refer to
"Viewing Data" on page 3-11 for Entire
or Custom Data Lists.
After making a selection, press ENTER
to establish a communication link.
Use the UP/DOWN arrow keys to scroll
through the PIDs.
A Vehicle Data List header marks the
beginning.
Change the selection of Custom Data List parameters at any time by pressing
the BACK key. This returns to the Custom Data List selection screen.
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Never operate the tool while driving. Have another person
assist with the operation of the tool.
GM Function List
1)Read Codes
2)Erase Codes
` 3)View Data
Select Group
Engine Group 1
Engine Group 2
` Engine Group 3
Select Data To View?
1)Entire Data List
` 2)Custom Data List
Custom Data List
Codes Present
1ST GEAR SW
A/F RATIO
?
[
~
?
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Yes
ON [
18.8~