Page 225 - Manual Oficina Polaris RS1 2018 e 2019

FUEL SYSTEM

CRANKSHAFT POSITION SENSOR (CPS)

OPERATION OVERVIEW CPS TEST
Mounted on top of the stator cover, the crankshaft The CPS is a sealed, non-serviceable assembly. If fault
position sensor q is essential to engine operation, code diagnosis indicates a problem with this sensor, test
constantly monitoring the rotational speed (RPM) and as follows:
position of the crankshaft.
1. Locate the CPS harness connector above the
transmission on the RH side of the vehicle and
disconnect the harness.
2. Pin q is for the shield circuit and it should be OL to
pins w & e. A resistance reading would indicate a
shorted sensor.

4

A ferromagnetic 35-tooth encoder ring with a missing
tooth is built onto the flywheel. The inductive speed
sensor is mounted 1.0 ± 0.26 mm (0.059 ± 0.010 in.)
away from the encoder ring. During rotation, an AC pulse
is created within the sensor for each passing tooth. The
ECU calculates engine speed from the time interval 3. Connect an ohmmeter between CPS pin terminals w
between the consecutive pulses. & e. A resistance value of 1000Ω ± 10% at room
temperature should be obtained.
The encoder ring missing tooth creates an “interrupt”
input signal, corresponding to specific crankshaft CPS Resistance Specification:
position. This signal serves as a reference for the control 1000Ω ± 10%
of ignition timing by the ECU. Synchronization of the
CPS and crankshaft position takes place during the first 4. If the resistance is correct:
two revolutions each time the engine is started. This • Test the main harness circuit between the sensor
sensor must be properly connected at all times. If the connector terminals and the corresponding pin
sensor fails or becomes disconnected for any reason, the terminals at the ECU (see wiring diagram).
engine will stop running. • Check the sensor mounting, air gap, flywheel
encoder ring for damage or runout, and flywheel
key. Follow the CPS Replacement procedure to
inspect CPS and flywheel encoder ring for damage.
5. If resistance is incorrect, follow the “CPS
Replacement” procedure.

9928689 - 2018 RZR RS1 Service Manual 4.39
© Copyright Polaris Industries Inc.