Detonation Elimination Technology (DET)

Content Source: 2019 PRO-RMK / RMK ASSAULT / SKS 155 Owner’s Manual (9928945 R01) > Features Chapter

IMPORTANT

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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
600 Models
LED illuminated / “DETONATION” displayed	Slight drop in engine RPM/power
LED flashing / “DETONATION” displayed	Engine shut-off
800 HO 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.

NOTE

The PIDD alert indicates which cylinder is experiencing detonation

NOTE

The most likely causes of severe detonation are outlined in the troubleshooting table below.

Oil Pump Failure Protection

If the ECU determines there is a problem with the electronic oil pump control circuit, the engine management system will limit engine speed to approximately 4000 RPM and illuminate the check engine indicator light on the instrument cluster or PIDD.