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9924707 - 2013–2014 RZR 800 Service Manual
© Copyright 2013 Polaris Sales Inc.
CRANKSHAFT POSITION SENSOR
(CPS)
Operation Overview
The crankshaft position sensor is essential to 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.
CPS Test
The CPS is a sealed, non-serviceable assembly. If fault
code diagnosis indicates a problem with this sensor, test
as follows:
1. Disconnect CPS (3-wire) harness connector on left-
hand side of vehicle located below the transmission.
2. Connect an ohmmeter between the pin terminals
leading from the Yellow and White wires. A
resistance value of 560Ω ± 10% at room temperature
should be obtained.
CPS Resistance Specification:
Yellow to White: 560Ω ± 10%
ELECTRONIC FUEL INJECTION
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