Manual
2. Problem: Key power-on switch does not seem to work.
G. Advanced Troubleshooting
NOTES:
• If the motorcycle has a check engine light, this can be used to read stored codes. For motorcycles without an OEM check engine light, there is an LED on
the face of the ignition module that functions as a check engine light, and can also be used to read stored codes.
• Trouble codes are stored in memory for as long as the fault exists, and for 50 on/o cycles of the key after a fault is corrected. The S&S IST Guardian™
Diagnostic System (P/N 55-5075) has code clearing capability, and is a way to clear trouble codes immediately after a fault has been corrected. If a fault
still exists, a new trouble code will be generated.
• Before purchasing the S&S IST Guardian™ Diagnostic System (P/N 55-5075) note that the software is only compatible with Windows® 2000/XP/Vista/7 32-
bit systems. It will not work on 64-bit operating systems.
• Also, be aware that the Guardian system is only compatible with the S&S IST ignition module. It will not work with stock Harley-Davidson® or other
aftermarket modules.
1. Overview of check engine light operation.
2. Retrieving and displaying codes using the Check Engine light.
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