
4
4.29
9924874 R02 - 2014
RZR
XP / XP 4 1000 Service Manual
© Copyright 2013 Polaris Industries Inc.
TEMPERATURE / MANIFOLD ABSO-
LUTE PRESSURE (T-MAP) SENSOR
Operation Overview
Mounted on the end of the intake, the T-MAP (Item 1)
performs two functions in one unit. The T-MAP detects
intake air temperature as well as manifold absolute
pressure.
These sensor signals, comprised of separate intake air
temperature and manifold absolute pressure readings
are processed by the ECU and compared to its
programming for determining the fuel and ignition
requirements during engine operation. The T-MAP
provides the ECU with engine load data.
T-MAP Test / Replacement
The T-MAP is a non-serviceable item and can only be
tested using Digital Wrench®. If the sensor is faulty, it
must be replaced.
NOTE:
This sensor should only be tested using
Digital Wrench® Diagnostic Software (dealer only).
CRANKSHAFT POSITION SENSOR
(CPS)
Operation Overview
Mounted on top of the stator cover, the crankshaft
position sensor (Item 1) is essential to engine operation,
constantly monitoring the rotational speed (RPM) and
position of the crankshaft.
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
between the consecutive pulses.
The encoder ring missing tooth 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.
ELECTRONIC FUEL INJECTION
Summary of Contents for 2014 RZR XP 1000
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