Page 232 - Manual Oficina Polaris RZR XP 1000 17-18

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.

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
The encoder ring missing tooth creates an “interrupt” temperature should be obtained.
input signal, corresponding to specific crankshaft
position. This signal serves as a reference for the control CPS Resistance Specification:
of ignition timing by the ECU. Synchronization of the 1000Ω ± 10%
CPS and crankshaft position takes place during the first
two revolutions each time the engine is started. This 4. If the resistance is correct:
sensor must be properly connected at all times. If the • Test the main harness circuit between the sensor
sensor fails or becomes disconnected for any reason, the connector terminals and the corresponding pin
engine will stop running.
terminals at the ECU (see wiring diagram).
• 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 the resistance is incorrect, follow the CPS
Replacementpage 4.39 procedure.

4.38 9928492 R06 - 2017-2018 RZR XP 1000 / XP4 1000 Service Manual
© Copyright Polaris Industries Inc.