Crankshaft Position Sensor (Cps) - Polaris 2012 RANGER RZR 570 INTL Service Manual

ELECTRONIC FUEL INJECTION

CRANKSHAFT POSITION SENSOR (CPS)

Operation Overview
Mounted on top of the stator cover, the crankshaft position
sensor is es sential to
monitoring the rotational speed (RPM) and position of the
crankshaft.
A ferromagnetic 35-tooth encoder ring with a missi n g 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 rin g. During ro tation, a n AC pu lse is cr eated
within the se nsor for each p assing to oth. Th e ECU
calculates en gine speed from th e tim e inte rval be tween
the consecutive pulses.
The encoder ring missing tooth creates an "interrupt" input
signal, corresponding to specific crankshaft position. This
signal serves as a r eference for the con trol of ig nition
timing by the ECU. Synch
crankshaft po sition t akes place d uring the
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.
4.14
engine op eration, co nstantly
CPS
ronization o f the CPS a nd
first two
9923523 - 2012 RANGER RZR 570 Service Manual
© Copyright 2011 Polaris Sales Inc.
CPS Test
The CPS is a sealed, non-serviceable assembly. If fault
code diagnosis indicates a problem with this sensor, test
as follows:
1. The CPS is accessible through the r ight-hand r ear
wheel well area.
2. Disconnect CPS harness connector.
CPS
Connector
3. Connect an ohmmeter between the CPS pin terminals
shown below. A resistance value of 1000 Ohm ± 10%
at room temperature should be obtained.
CPS Connector
CPS Resistance Specification:
1000 Ohms ± 10%
CPS
Location
1000 ± 10%