Crankshaft Position Sensor (Cps); Operation Overview; Cps Service - Polaris Sportsman XP 1000 S 2020 Service Manual

ENGINE ELECTRICAL

CRANKSHAFT POSITION SENSOR (CPS)

OPERATION OVERVIEW

The Crankshaft Position Sensor (CPS)
engine operation, constantly monitoring the rotational
speed (RPM) and position of the crankshaft.
A ferromagnetic 60-tooth ring gear with two consecutive
teeth missing is mounted on the flywheel. The inductive
speed sensor is mounted 1.0 ± 0.26 mm (0.059 ± 0.010
in.) away from the ring gear. During rotation, an AC pulse
is created within the sensor for each passing tooth. The
ECU calculates engine speed from the time interval
between the consecutive pulses. The two-tooth gap
creates an "interrupt" input signal, corresponding to
specific crankshaft position. This signal serves as a
reference for the control of ignition timing by the ECU.
Synchronization of the CPS and crankshaft position
takes place during the first two revolutions each time the
engine is started. This sensor must be properly
connected at all times. If the sensor fails or becomes
disconnected for any reason, the engine will stop
running.
4.22

CPS SERVICE

q
is essential to
1. Remove the intake / plenum. See "Intake
2. To perform a static test on the Crankshaft Position
3. If the sensor static resistance tests in spec, it could
4. If removing the sensor, torque the fastener to
Replacement".
Sensor (CPS), disconnect the CPS electrical
connector. Set your digital multimeter to Ohms, and
test the resistance of the internal circuit of the sensor.
The wires in the harness that correspond/match up
with this circuit are the WHITE (WH) and BLACK (BK)
wires. The BROWN (BN) wire is a shield.
Crankshaft Position Sensor:
1050Ω ± 10% (20° C, 68° F)
still be dynamically failing (not producing a proper
output). First check for good (under 1 ohm) continuity
on all 3 CPS circuits and for no shorts to ground. If
those circuits check out, trying a known good sensor
even if the static resistance test passes is advisable.
specification.
TORQUE
Crankshaft Position Sensor (CPS) Fastener
89 in-lbs (10 N·m)
9931493 R03 - 2020-2021 Sportsman XP 1000 S Service Manual
© Copyright Polaris Inc.