Over Heating - Polaris RZR PRO XP 2020 Service Manual

GENERAL INFORMATION

OVER HEATING

1. Verify coolant is filled to correct level.
• If coolant is low, fill to correct level.
2. Test and check for correct coolant mixture.
• If coolant mix is incorrect, correct mixture as
necessary.
• If incorrect coolant was used in vehicle, flush cooling
system and bleed, fill to correct level, and recheck.
3. Check cooling system using combustion leak tester
for any combustion gasses entering the cooling
system. Adding coolant before test may dilute the
system and cause inaccurate test results.
4. Check Radiator and cooling fans for restrictions or
damage
• Check for debris, dirt, or mud between fan and
radiator restricting air flow. If present, clean and
recheck.
• Check for damage to radiator or cooling fans. If
damage is found to components repair or replace
as necessary.
• Inspect for any aftermarket modifications that may
be restricting air flow. (Radiator Modifications, Grille
Modifications, Aftermarket Bumpers, Lightbars,
etc.) Pay close attention to the Radiator Shroud
presence and placement.
5. Check for coolant leaks / air pockets.
• Visually check all hoses and radiator for leaks. If
leaks are found repair as necessary.
• Check cooling system using coolant pressure
tester. If leaks can not be seen on visual inspection,
refer to Engine / Cooling system for more
information.
• Check for air in cooling system. Bleed the cooling
system if needed.
6. Check Oil level.
• Low oil level or oil in need of changing may cause
increase in engine temperature.
• Too high of oil level may cause engine
temperatures may cause increase in engine
temperature.
• Check level and correct as necessary. Check
maintenance history to determine if oil need to be
changed.
7. Check Cooling Fan operation.
1.28
• Make sure the cooling fan is engaging. Command
cooling fans on and off using Digital Wrench to
check operation.
• Monitor engine temperature using Digital Wrench®
viewing the Engine Temperature PID. Once engine
has reached running temperature cooling fan
should engage.
8. Water Pump / Thermostat / Radiator may be suspect
of concern.
• Thermostat could be opening too slowly or stuck
closed. Check temperature using Digital Wrench®
viewing the Engine Temperature to check for
correct operation.
• Water pump may be faulty or not circulating
enough coolant to keep temperature within
specification.
• Radiator core may not be functioning correctly or
failed causing concern.
9. Faulty Temp Sensor / Circuit / ECU.
• Confirm engine is overheating. It could be possible
that the coolant sensor is sending an incorrect
signal causing the ECU to think the vehicle is
overheating when it is running at the proper
temperature.
• Check connections at temp sensor and wiring. If
damage is found repair, as needed.
• Resistance test sensor, refer to ECT Sensor test. If
test fails, replace sensor.
• If concern is still present after sensor replacement
suspect the ECU is not receiving correct signal
input. Inspect circuit wiring.
10. Engine Damage
• The overheating concern may be caused by an
engine concern.
• Refer to the necessary section in the Service
Manual for further engine testing.
11. Inspect ECU calibration level.
• If any ECU calibrations are available, update at this
time.
9930583 R02 - 2020 RZR PRO XP / XP 4 Service Manual
© Copyright Polaris Industries Inc.