Insufficient Cooling (Air Flow And Compressor Operation Are Normal); Compressor Does Not Operate At All Or Operates Improperly - Polaris RANGER XP 900 2018-2019 Service Manual

ENGINE / COOLING / HVAC SYSTEM

INSUFFICIENT COOLING (AIR FLOW AND COMPRESSOR OPERATION ARE NORMAL)

SYMPTOM
1. System low on refrigerant.
2. Excessive refrigerant.

COMPRESSOR DOES NOT OPERATE AT ALL OR OPERATES IMPROPERLY

1. Verify A/C pressures.
2. Check for Power at the A/C compressor.
• If power is present, check for ground issues and
replace the compressor assembly.
• If power is not present, proceed to step 3.
3. Pull the A/C clutch relay to test for powers and
ground.
• Verify Pin 69 has continuity to ground through the
compressor clutch.
– If ground is not present, check for continuity in
the wire to the compressor. If there is no
continuity, replace the harness or repair the
wire.
• Verify power is present at Pin 63.
– If power is not present, proceed to step 4.
• Verify power is present at Pin 64.
– If power is not present, proceed to step 5.
• Verify continuity to ground at Pin 70 through the
ECU.
– If ground is not present, proceed to step 10.
4. Check Pin 45 for Power out when the A/C is
commanded on.
• If there is power present, check continuity to pin 63.
Pin 45 will feed power to the temp sensor, water
valve, and the HVAC control.
• If there is not power, check Pin 40 for power. If no
power is present, inspect the HVAC fuse.
• Check pin 46 for continuity to ground.
• Check pin 39 for power. If not present, check the
wire for continuity back to the key switch
• If no issues were found, replace the relay. Repair/
replace the harness if necessary.
5. Check the High pressure cutoff switch for power at
Pin A.
• If power is present replace the HP switch.
• If there is no Power at the HP switch, measure the
Pin A wire to the thermostat Pin 1 white wire.
3.144
POSSIBLE CAUSE
The high side pressure will be low and bubbles
may be present in sight glass on receive drier.
The high pressure side pressure will be high.
9929399 R01 - 2018-2019 RANGER XP/ CREW 900/1000 Service Manual
6. Check for continuity to ground on the Black wire and
power on the Blue wire at the thermostat switch
located in the HVAC box.
• Jumper the Red wire to the White wire and see if
the Compressor engages. If it does, replace or test
the temp switch with a new temp switch.
7. If there is no power on the Blue wire, verify the A/C
switch lights up when pressed.
• If not, then inspect the back of the HVAC controls.
8. At the HVAC controls, unplug the A/C switch.
• Verify power is present on the white wire when the
fan is on, and ground is present on the black wire.
If both are present and no power is present on the
blue wire when plugged in, replace the HVAC
control head.
– If ground is not present, replace/repair the
wiring
– If power is not present, proceed to step 9.
• The Blue wire should have continuity to the
Thermostat switch at the HVAC box. If not replace/
repair harness.
9. On the fan switch, verify power is present on the
white wire. If present, replace/repair the wiring to the
switch. If not present, verify Red/Blue wire has
power. This powers the fan and the switch. If power
is present, replace the HVAC control head. If power is
not present on the Red/Blue wire, proceed to step 12.
10. Check continuity on the wire back to ECU pin 241. If
faulty, replace/repair the harness to the ECU. If
continuity is present, continue to the next step.
11. Proceed to test the A/C switch relay for powers and
ground.
• Verify power is present on Pin 25. If power is not
present, check for continuity to the A/C switch on
the blue wire. If continuity is present, proceed to
next step.
• Verify ground is present on Pin 26. If ground is
open, repair/replace harness.
SOLUTION
Repair any leaks and
recharge the A/C system
Recover and recharge system
to the correct refrigerant level.
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