Polaris MATRIX INDY VR1 Series Owner's Manual page 41

DETONATION ELIMINATION TECHNOLOGY
(DET)
When DET senses and takes action to reduce detonation, the driver may notice
a drop in engine RPM and/or reduced performance.
The ECU will illuminate the check engine LED and display "DETONATION" on
the LCD screen whenever the DET system is active.
If the ECU determines the detonation cannot be controlled by normal means,
and further operation may cause engine damage, the check engine LED will
flash, the instrument clusters will display "DETONATION" and the ECU will
either limit the maximum engine speed or turn off the engine.
If the ECU limits RPM, the limit will remain active until the driver stops and
restarts the engine.
Check Engine LED/Gauge Display
LED illuminated / "DETONATION"
displayed
LED flashing / "DETONATION" displayed
LED illuminated / "DETONATION"
displayed
LED flashing / "DETONATION" displayed
DETONATION PROTECTION MODES
650 Models
850 Models
Protection Mode
Slight drop in engine RPM/power
Engine shut-off
Slight drop in engine RPM/power
Exhaust valves close to reduce engine
RPM/power. Restart engine to reset.
FEATURES
39