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Sensor Graphing
The ability to look at Sensor Data is one of the most usefull functions when looking
at an OBD2 system. Values that can be looked at include
Coolant Temperature
Oxygen
Sensor Readings
Fuel Trim
RPM
Mass Air Flow (MAF)
Manifold Absolute Pressure (MAP)
Vehicle Speed (VSS)
Ignition Timing Advance
Intake Air Temperature (IAT) Calculated
Load
Throttle Position (TPS)
And Others
These data items are refered to as PIDS. Newer vehicles usually have a more
expanded set of PIDS to view.
Escan also provides some calculated PIDS that are not included in the Generic OBD2
specification. These PIDS are derived from other PIDS and the program itself. Engine
Run Time and Battery Voltage are two examples of calculated pids.
Escan can graph PIDS in many different ways.
One way is the main graph page which can graph 8 PIDS in their own seperate graphs
stacked together.
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Another way is up to 4 Pids in 2 seperate Dual Graphs. |
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A third way would be in the Measurement Graph. |
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You can download the Escan Program here. Escan Download
You can download a Data Capture here.
2003 Pontiac Grand Am Data
You can then Open the Escan Program in Demo Mode and Load the Data capture (F10)
to display the data and try out the graphing.
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