Engine Temperature Sensor; Operation Overview; Engine Temperature Sensor Test; Engine Temperature Sensor Replacement - Polaris Sportsman 800 EFI 4x4 2012 Service Manual

FUEL SYSTEM - GENERAL

ENGINE TEMPERATURE SENSOR

Operation Overview

Mounted on the cylinder, the engine temperature sensor
measures coolant temperature. The engine temperature
sensor is a Negative Temperature Coefficient (NTC) type
sensor, as the temperature increases the resistance
decreases.
Refer to Chapter 10 for testing. Standard resistance
readings according to temperature:
Coolant passes through the cylinder and by the sensor
probe, varying a resistance reading which is relayed to
the ECU. This signal is processed by the ECU and
compared to it's programming for determining the fuel
and ignition requirements during operation. The ECU
also uses this signal to determine when to activate the
fan during operation. If for any reason the engine
temperature sensor circuit is interrupted, the fan will
default to "ON".
4.30

Engine Temperature Sensor Test

To quickly rule out other components and wiring related
to the ETS, disconnect the harness from the ETS. The
fan should turn on and 'HOT' should indicate on the
instrument cluster. This indicates all other components
are working properly.
Refer to Chapter 10 for ETS testing. Polaris dealers can
also test the sensor by using the Polaris Digital Wrench®
Software (dealer only). Refer to the Digital Wrench®
Software Manual for more information.
TEMPERATURE °F (°C)
68 °F (20 °C)
212 °F (100 °C)

Engine Temperature Sensor Replacement

1. Drain coolant to level below sensor
2. Disconnect sensor from engine harness.
3. Using a wrench, remove and replace the sensor,
applying a light coating of thread sealant to aid
installation.
4. Torque the sensor to specification.
9924864 - 2012-2014 SPORTSMAN 800 / 6X6
© Copyright 2013 Polaris Sales Inc.
ETS Resistance Readings
RESISTANCE
2.5 kΩ ± 6%
0.186 kΩ ± 2%
Engine Temperature Sensor:
18 ft-lbs (25 Nm)