2006 Polaris 600 Switchback Owners Manual - Page 32

Detonation Elimination Technology (D.E.T.) FEATURES The DET system prevents damage to the engine from detonation while developing the maximum power of the engine safely. A detonation sensor monitors the engine and responds to detonation by automatically reducing the engine timing. This can result in decreased engine RPM and performance. The engine is designed to provide maximum power when premium (91 octane) fuel is used. If a lower octane fuel is used, or if the jetting is incorrect for your altitude, the DET system will retard ignition to prevent detonation. When the DET system is adjusting the timing, the DET light on the gauge will flash. In most cases the flashing will be temporary and the timing will return to normal. If there is intermittent flashing, it s likely that the fuel or jetting is incorrect. In extreme conditions the DET system retards timing and holds it in a retarded state. The DET light will remain on until the engine is turned off and restarted. DET Troubleshooting Use this chart to determine causes and solutions for detonation. If none of these conditions exists and the sensor remains activated, see your Polaris dealer for diagnosis. Possible Cause Poor quality fuel Improper engine modifications Improper jetting Solution Replace with higher quality fuel Do not modify the engine Use the correct jetting for your altitude Sensor Fail-Safe The DET includes a sensor fail-safe system to prevent the engine from damage if the sensor fails, becomes disconnected or is unable to detect detonation. The rider will experience a loss in power. The sensor must be reconnected or repaired to regain full power. NOTE: The DET light will flash six times if the sensor fails or becomes disconnected. 29