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Appendix: The Colour Graphing Scanner
Introduction
NOTE:
Only the additional key and functions are explained here. For
standard operating features, refer to the Scanner section and
the Primary Cartridge operator’s manual.
The Colour Graphing Scanner has the ability to select and graph parameters
from a ‘live data’ menu, e.g. ‘Codes and Data’ or ‘Data only’, on screen in a
graphical format (refer to Figure 1). This mode is called Graphing Mode.
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The advantages of the Graphing Mode are:
-
it allows the operator to quickly spot glitches, dropouts, spikes and other
signal inconsistencies. This comes in handy when conducting a wiggle test
or trying to induce symptoms, because it eliminates the need to constantly
monitor the screen while watching for parameter values to change. Now
full attention can be applied to the testing procedure, with only an occa-
sional glance at the screen to see if the graph pattern has changed.
-
it allows the operator to quickly compare the activity of two parameter sig-
nals to see if they are synchronized or if they both respond correctly to
changes in operating condition (example—comparing the crankshaft posi-
tion sensor to the camshaft sensor signal).
The Colour Graphing Scanner also provides a capture function that allows the
live data to be frozen on the screen for review. This feature is ideal for capturing
intermittent failures during a test drive.
The Colour Graphing Scanner uses the same Primary and Trouble Shooter
cartridges as the Scanner.
Baud rate settings
Prior to entering the Graphing Mode, ensure that the baud rate is set to
4800
,
9600
or
19200
baud.
Setting the baud rate is described in the relevant section of this manual.