S&S Cycle Cycle Guardian Diagnostic System - Manual (Page 12)

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Dwell Time
This displays the amount of time that current flows through the
primary of the ignition coil for each cylinder.
Battery Voltage
This is the voltage level of the motorcycle's battery and electrical
system.
Sensor Voltage
This is the level of the voltage that is supplying the sensors on the
motorcycle.
Coil Current
This is the amount of electrical current flowing through the
ignition coils.
Diagnostic Trouble Codes (DTCs)
To view the engine Diagnostic Trouble Codes (DTCs), click on the
tool bar button.
The DTC display will show you all of the error codes displayed in
the IST Ignition Module's memory. Current codes are highlighted
in red. Historic codes are shown in white. "Cycles" indicates the
number of key cycles needed to clear the code. This is an indicator
of how many key cycles, or how long ago an error occurred.
The display shows you the current DTC code, Cycles, and a brief
description of the error.
The engine sensor data at the time the most current DTC was set
(such as RPM, voltage, etc.) is also displayed.
To clear the trouble codes from the IST Ignition Module's memory,
click on the "Clear DTCs" button. To refresh the display to show the
most current trouble codes, click on the "Refresh DTCs" button.
When you are finish with this screen, click on "OK" to close the DTC
window.