2005-2007 Polaris Ranger 500 service manual, Page 310Get this manual
ELECTRICAL DCCDI IGNITION SYSTEM (NON-EFI MODELS)
DCCDI Ignition System Overview
This engine uses DCCDI ignition systemSome of the advantages of DC ignition are: Stronger, more consistent spark at low rpm for better performance Easier starts Simpler component design for ease of trouble shooting and maintenance Operation Overview: The DCCDI system relies on battery power for ignitionInstead of generating DC voltage via magnetic induction, 12 volt DC current is supplied directly to the CDI unit from the batteryAt the CDI, 12 volt DC current charges an internal capacitor to build up the initial ignition chargeA small AC signal from the Trigger (Pulse) coil closes thyristor (located in the CDI) at point pre-determined in the crankshaft rotation by magnets on the flywheel's outer diameterThis signal releases the electrical charge which saturates the coil for ignitionDCCDI systems have the ability to ignite with as little as volts of powerNOTICE: Do not remove the wiring harness from the CDI box while the key switch is on or while the engine is runningDamage to the CDI box may occur!