Detonation Elimination Technology; Det Troubleshooting - Polaris 600 RUSH Owner's Manual

Detonation Elimination Technology (DET)
The DET system prevents damage to the engine from detonation by
going into an engine protection mode whenever the DET system is
active. Depending on the level of detonation encountered, the check
engine light could be solid, it could flicker or it could flash steadily.
Check Engine Light
Off
Solid or Flickering
Steady Flashing
When excessive detonation is detected,
the check engine light will come on solid,
or it may flicker, and you may notice
decreased engine performance and RPM
when the DET system is activated. In
most cases this is temporary and the oper-
ator does not need to take any action. The
engine will return to its normal perfor-
mance automatically.
If severe detonation occurs, the check engine light will begin to flash
steadily and the gauge indicator will read "dET" (see illustration). The
engine will enter a limp home mode and RPM will be limited to 6500
RPM. The engine will remain in this mode until it is shut down and
restarted.
The most likely causes of severe detonation are outlined in the trouble-
shooting table below.

DET Troubleshooting

Cause of DET Activation
Poor quality fuel
Incorrect ethanol/non-ethanol fuel
resistor installed
Low fuel/no fuel in tank
Water in fuel
Plugged fuel filter
Alcohol-based fuel additive used with
Ethanol fuel
Improper engine modifications
Mild detonation may be detected
Excessive detonation detected
Severe detonation detected, RPM will be limited
Replace with higher quality fuel
Verify correct fuel resistor for fuel type
in tank
Refuel with recommended fuel
Replace with recommended fuel
See your Polaris dealer for service
Do not add deicers or additives that
contain any form of alcohol while
using up to 10% ethanol fuel
Do not modify the engine
FEATURES
Indicates
Solution
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