Page 248 - Manual Oficina Polaris RZR XP 1000 17-18

FUEL SYSTEM

CYLINDER MISFIRE DETECTION throttle limitation unless the misfiring continues to occur.
The check engine light will remain illuminated until there
NOTICE are 4000 engine revolutions (i. e. 4000 RPM for one
minute) without a significant misfire being detected.
This process only applies to some MY15 and later
models. Once this condition is met, the check engine light will turn
off and the code(s) will show as historic.
Refer to this procedure only if one of the codes shown
below is displayed in Digital Wrench. If a misfire code has been set and there is no observed
misfire, cycle the key and allow 4000 engine revolutions
The ECU monitors crankshaft speed via the crankshaft to see if the check engine light turns off. If it does not turn
position sensor. A misfire will cause a fluctuation in off, diagnose by verifying the following items:
crankshaft speed. A code will set and turn on the check • Low battery voltage (loose connection, low charge,
engine light after an engine misfire threshold/rate is bad battery)
detected that is above a pre-determined limit. This
threshold varies based on engine speed. • Faulty voltage regulator
One or more of the following codes will be set if a misfire • Ignition Coil and connections are good
occurs:
• Spark plugs wires are secure
• P0301 (SPN 65591/FMI 7) Misfire Detected, Cylinder • The correct spark plugs are installed and the plugs are
1 (MAG)
not fouled
• P0302 (SPN 65592/FMI 7) Misfire Detected, Cylinder • Crankshaft Position Sensor tests good
2 (PTO)
• Wiring to the Crankshaft Position Sensor, ECU and
• P0314 (SPN 65590/FMI 7) Misfire Detected, Cylinder Ignition Coil are not damaged. Chassis ground is clean
Not Identified
and tight
• Fuel pressure is within specification
Once a cylinder misfire code is set, the following events
will occur: • Fresh/good quality fuel is in the fuel tank
• Check Engine Light illuminates • Engine mechanical is good (leak down, timing)
• If the cylinder can be detected by the ECU (code • Confirm the belt is in good condition, specifically
P0301 or P0302), the ECU will deactivate the fuel looking for signs of hour-glassing
injector for that cylinder. This will remain in effect until
the key is cycled off and back on. • Confirm primary clutch operation (worn/incorrect
weights, loose spider/jam nut)
• If the cylinder with the misfire cannot be detected
(code P0314), the ECU will limit available power by • Confirm secondary clutch operation (sliders, rollers,
limiting how far the throttle plate opens. helix)

One the key is cycled, the trouble code (s) will show
current but there will be no fuel injector deactivation or

4.54 9928492 R06 - 2017-2018 RZR XP 1000 / XP4 1000 Service Manual
© Copyright Polaris Industries Inc.