Polaris 850 PRO-RMK 155 2.6" QD 2021, Manual

Page: 361 / 747

4
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
4.5
DETONATION (DET) TROUBLESHOOTING
If the check engine LED is illuminated and/or flashing with “dET” or “DETONATION” displayed on the instrument
cluster, reference the following table.
POSSIBLE CAUSES OF (DET) ACTIVATION
SOLUTION
Low fuel/no fuel in tank Refill tank with recommended fuel
Incorrect fuel type selector setting Verify the correct fuel type is set using fuel selector
Poor quality fuel / water in fuel
Replace with higher quality fuel. Recommended 91
octane minimum
Alcohol-based fuel additives used with ethanol fuel
Do not use deicers or additives that contain any form of
alcohol when using ethanol-blended fuel
Restricted fuel pickup in fuel tank
Inspect fuel pump pickup if fuel is found to be
contaminated
Low fuel pressure
Verify fuel pressure is 57 to 62.5 psi (393 to 431 kPa) at
idle and while riding
Low fuel injector voltage
Verify fuel injection circuit is at 16 VDC when engine is
running
Faulty / plugged fuel injector Use Digital Wrench to troubleshoot
Exhaust valve system malfunction
Verify valves are not stuck open, vent hoses are not
frozen or plugged
Use Digital Wrench to troubleshoot
Knock sensor malfunction
Verify knock sensor screw torque is set to specification
Air leaks
Verify air intake system is sealed. Check throttle body
boots for cracks/tears/loose parts. Remove after-market
air intake system.
Engine/exhaust modifications
Remove modifications
Engine coolant temperature too high
Check cooling system. Ride snowmobile on loose,
unpacked snow
Mechanical failure
Verify crankcase seals are good (not leaking). Verify
engine in good condition. Check spark plugs.
EXTENDED IDLE ENGINE SHUTDOWN MODE
This engine feature causes the ECU to shut down the engine when engine temperature reaches 115° F (46° C) and
there is no throttle lever input for five minutes.
NOTICE
If equipped with an PIDD, the gauge will remain on because the key is in the ON position.
ENGINE ELECTRICAL