2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 289Get this manual
I 17IGNITION SYSTEM
SERVICE INFORMATION TROUBLESHOOTING IGNITION SYSTEM INSPECTION 17-1 17-2 17-3 IGNITION COIL IGNITION TIMING
SERVICE INFORMATION
GENERAL
Some electrical components mav be damaged il terminels connectors are connected or disconnected while he ignilion switch is ON and current is present When servicing the ignilion system, alwaVs follow the steps in the troubleshooting sequence on page 17-2 The ignition timing cannot be adjusted since the Ignition Control Module UCM) is factory praset The leM may be damaged if droppedAlso, if the connecto is disconnected when current is flowing, the excessive voltage may damage the leMAlways turn OFF the ignition switch before servicing fa ulty ignition system is olten related to poor connec ted or corroded connectorsCheck Ihose co nnections before proceed ing Use spark plugs of the correct heet rangeUsing spark pl ugs with an incorrect heat range can damage the engineo For ignition switch and engine stop switch inspection, refer to Section 19o Fo ignition pulse generator (al ternator Slator) remova linstallationrefer to Section 11