Detonation (Det) Protection Modes - Polaris 850 MATRYX INDY XC 129 2021 Manual

ENGINE ELECTRICAL

DETONATION (DET) PROTECTION MODES

When the Detonation Elimination Technology (DET) in the ECU is sensing and taking action to reduce detonation, the
driver may notice a drop in engine RPM and / or reduced performance.
The ECU will illuminate the instrument cluster check engine LED and display "DET" or "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 cluster will display "DET" or "DETONATION", and the ECU
will either limit the maximum engine speed or shut-off the engine. If the ECU limits RPM, the limit will remain active
until the driver turns off and restarts the engine.
CHECK ENGINE LED / GAUGE
MODEL PROTECTION MODE
DISPLAY
Check engine LED illuminated / Driver may notice slight drop in
"DET" or "DETONATION" displayed engine RPM / power
650 / 850 Models
Exhaust valves closed to reduce
Check engine LED flashing / "DET" or
engine RPM / power. Re-start engine
"DETONATION" displayed
to reset.
Standard Gauge 7S Display
9850064 R03 - 2021 650 / 850 Matryx Trail Performance / Crossover Snowmobile Service Manual
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