4.20
FUEL INJECTION
ECT 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 ECT testing. Polaris dealers can also test
the sensor by using the Digital Wrench™ Diagnostic Software
(dealer only). Refer to the Digital Wrench™ User Guide for
more information.
ECT 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 17 ft. lbs. (23 Nm).
ECT Sensor Resistance Readings
Temperature F (C) Resistance
68 F (20 C) 2.5 k 6%
212 F (100 C) 0.186 k 2%
= T
ECT Retaining Bolt Torque:
17 ft. lbs. (23 Nm)
Engine Temperature Sensor
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