Lock / Unlock Parameters; Six-Graph Display; Three-Graph Display - GMC Tech2 User Manual

Three-Graph Display

To access the three-graph display mode:
1. Click the Display Graph (three) icon.
2. Click on the first graph icon at the top of the Graph Parameters window, then select a
parameter from the list in the lower portion of the box. The parameter name will appear
next to the first graph icon.
3. Repeat this procedure for the second and third graphs.
IMPORTANT: When selecting parameters to be graphed, it is important to consider the
values used to measure the parameter, and to correctly plot these on the graphs. This is
done in the "Min Y Axis Value" and "Max Y Axis Value" fields. These may need to be
adjusted to reflect the normal range of values for the parameter — for example, 0 to 5 volts
for MAP sensor.
4. When one to three desired parameters have been selected, click OK.
5. The screen changes to display the chosen parameters in graph form.
•
Using the navigation icons, move through the parameters.
•
Click and drag on the arrow along the bottom of each graph to move through the
graph. This arrow represents the current frame being viewed. It is useful for
pinpointing precisely when a parameter change indicates a fault.
•
A data value corresponding to the frame the arrow is pointing to will be displayed in
the upper left corner of each graph.
6. To select a different parameter to be graphed, simply click and hold on the parameter
name in the data list, then drag the cursor over one of the existing graphs and release
the mouse button. The new parameter will be graphed in place of the old one.
7. To view a graph at full-screen size, move the cursor over the graph. When the cursor
changes to a magnifying glass, click on the graph. The graph will appear at full-screen
size. Click on the full-size graph to return to the three-graph display.

Six-Graph Display

Up to six parameters can be displayed on a single graph. Parameters are selected in the
same manner as described for three-graph display. Each parameter is color-coded, and
you can change the background color to improve visibility.

Lock / Unlock Parameters

The Lock/Unlock Parameters function is used to isolate specific parameters so they can be
viewed and compared more easily than if they were part of the larger parameters list. To
use this function:
1. Select (highlight) the desired parameter, then click the Lock/Unlock Parameters icon.
The selected parameter will appear at the top of the data list, above a "lock line".
2. To add other parameters, follow the same procedure. The "locked" parameters can
then be viewed together to compare their data values. Parameters can also be locked
by double-clicking on them in the data list.
3. To remove an item from the locked list, select it, then click the Lock/Unlock Parameters
icon. The item will be removed from the list.
General Motors Tech2 User Guide
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