150
Coolant (COOLANT)
WT591
Display: Engine coolant temperature as measured by the
ECT sensor.
DTC: P0116, P0117, P0118, P0119
Usage: Monitor coolant temperature to verify the follow-
ing.
1. ECT sensor signal.
2. High Temperature indicator (on @ 230° F.)
3. Thermostat opening @ approximately 149° F (700)
or 176°F (500), indicated by a momentary drop or
pause in the rising temperature reading.
4. Fan ON @ 185° F, OFF @ 176° F (700) or ON @
194° F, OFF @ 185° F (500):
A. fan motor
B. fan relay
C. fan fuse
D. wiring connections
5. High Temperature Rev Limiter 5000 RPM @ 230° F.
Inlet Air Temperature (INTAKE)
WT592
Display: Inlet air temperature in Fahrenheit or Celsius.
DTC: P0112, P0113, P0114
Usage: Verify correct output of IAT sensor.
NOTE: After engine has been running, IAT read-
ings will be higher than outside air temperature due
to engine and engine compartment heat as well as
intake manifold heating.
MAP (AIR PRESS)
WT602
Display: MAP in millibars and in./Hg.
DTC: P0107, P0108
Usage: Verify barometric pressure signal correct.
NOTE: Local barometric pressure is given in in./Hg
(inches of mercury) and millibars. The gauge should
display approximately 965 millibars at 970 ft. above
sea level. This number will not change when the
engine is started. However, the value is being
observed internally in the ECM.
Idle Step Control (ISC)
WT542
Display: ISC position
DTC: P0508, P0509
Usage: Verify correct ISC position.
TPS (TPS)
WT539
Display: TPS position (0% closed, 95-100% WOT).
DTC: P0121, P0122, P0123
Summary of Contents for HDX 500 2017
Page 1: ...2017 S SERVICE ERVICE MANUAL ANUAL www arcticcat com ...
Page 188: ...187 NOTES ...
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