Content Source: 2021 INDY VR1 / INDY XC / Switchback ASSAULT Owner’s Manual (9931271 R01) > Features Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

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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.

DETONATION PROTECTION MODES

Check Engine LED/Gauge Display

Protection Mode

650 Models

LED illuminated / “DETONATION” displayed

Slight drop in engine RPM/power

LED flashing / “DETONATION” displayed

Engine shut-off

850 Models

LED illuminated / “DETONATION” displayed

Slight drop in engine RPM/power

LED flashing / “DETONATION” displayed

Exhaust valves close to reduce engine RPM/power. Restart engine to reset.

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NOTICE
The instrument cluster alert indicates which cylinder is experiencing detonation
NOTICE
The most likely causes of severe detonation are outlined in the troubleshooting table on DET Troubleshooting.

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