2006 Snowmobile Owner's Manual

36
FEATURES
Detonation Elimination Technology (DET)
(Turbo Models)
A detonation sensor m onitors the engine and responds to detonation by
automatically reducing the engine timing and adding fuel. This results
in decreased engine RPM and performance.
NOTE: Engine performance will be reduced if fuel with a lower
octane than 91 is used. See fuel recommendations on
page 79.
Effect o f DET
The DET system prevents damage to the engine from detonation while
developing the m aximum power of the engine safely. If t he system
senses detonation beyond a preset limit, it retards ignition timing and
adds fuel to reduce the detonation and prevent engine damage.
When the detonation returns to a permissible level, the system will
return spark and fuel to normal, allowing the engine to run at rated
power levels.
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 check engine light will illuminate if the sensor fails or
becomes disconnected.