4.38
9929419 R02 - 2018-2019 RZR XP / XP 4 Turbo S Service Manual
© Copyright Polaris Industries Inc.
PRESSURE SENSORS
BAP SENSOR
The Barometric Air Pressure sensor
q
, located on the
intake duct after the air filter, measures ambient air
pressure. The sensor reading is used to detect changes
in elevation and for turbo speed limiting for altitude.
BOOST PRESSURE SENSOR
The Boost Pressure Sensor
w
is the pressure sensor
that is used for boost target control and for turbo speed
limiting. The temperature sensor will provide a fallback in
case the intake manifold temperature sensor (TMAP)
fails.
The TMAP sensor and the Boost Pressure Sensor may
be interchanged for testing purposes as the sensors are
the same.
FUEL PRESSURE SENSOR (EVAP MODELS)
On EVAP models, the fuel pressure sensor
r
monitors
fuel pressure in the fuel supply line and sends pressure
data to the ECU. The ECU interprets the fuel pressure
data and raises or lowers fuel pressure based manifold
pressure.
The ECU also uses the fuel pressure sensor to prevent a
rich condition during a purge event.
TMAP SENSOR
The Temperature and Manifold Absolute Pressure
sensor (T-MAP)
e
is located on the intake manifold after
the throttle body. The sensor is the primary control
sensor for the EFI system and it measures the pressure
of the air going into each cylinder.
The TMAP sensor and the Boost Pressure Sensor may
be interchanged for testing purposes as the sensors are
the same.
AIR TEMPERATURE SENSOR DATA
The following table gives an approximate resistance
reading of the temperature sensor at the given
temperature.
TEMPERATURE
≈ RESISTANCE (Ω)
-40° F (-40° C)
45303
-31° F (-35° C) 34273
-22° F (-30° C)
26108
-13° F (-25° C) 19999
-4° F (-20° C)
15458
5° F (–15° C)
12000
14° F (-10° C) 9395
23° F (-5° C)
7413
32° F (0° C)
5895
41° F (5° C) 4711
50° F (10° C)
3791
59° F (15° C)
3068
68° F (20° C) 2499
77° F (25° C)
2056
86° F (30° C)
1706
95° F (35° C) 1411
104° F (40° C)
1174
113° F (45° C)
987
122° F (50° C) 833
131° F (55° C)
703
140° F (60° C)
595
149° F (65° C) 508
158° F (70° C)
436
167° F (75° C) 374
176° F (80° C)
323
185° F (85° C)
280
194° F (90° C) 243
203° F (95° C)
213
212° F (100° C)
187
221° F (105° C) 164
230° F (110° C)
144
239° F (115° C)
127
248° F (120° C) 113
EFI / FUEL SYSTEM
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