2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 517Get this manual
IGNITION SYSTEM
SERVICE INFORMATION
GENERAL
Some electrical components may be damaged if terminals or connectors are connected or disconnected while the ignition switch is ON and current is present When servicing the ignition system, always follow the steps in the troubleshooting table on page 21-4 This ignition system is controlled by peM
The ignition timing cannot be adjusted since the PCM is factory preset The PCM may be damaged if droppedAlso, if the connector is disconnected when current is flowing, the excessive voltage may damage the peMAlways turn off the ignition switch before servicing faultv ignition system is often related to poor connectionsCheck those connections before proceeding Make sure the battery is adequately chargedUsing the starter motor with weak battery results in slower engine cranking speed as well as no spark at the spark plug This vehicle's spark plug is equipped with iridium type electrodeDo not use any spark plug other than specified For CKP sensor removalinstallation (page 11-9) For ignition switch servicing (page 23-6) For engine stop switch inspection (page 23-7) For gear position switch servicing (page 14-44