4.30
ELECTRONIC FUEL INJECTION
ENGINE COOLANT TEMPERATURE
SENSOR (ECT)
Operation Overview
Mounted on the cylinder head, 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.
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 its
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”.
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
ECT Sensor Resistance Readings
Temperature
°
F (
°
C) Resistance
68
°
F (20
°
C)
2.5 k
Ω
±
6%
212
°
F (100
°
C)
0.186 k
Ω ±
2%
=
T
ECT Retaining Bolt Torque:
17 ft. lbs. (23 Nm)
Engine Temperature Sensor
Содержание 2008 Ranger RZR
Страница 9: ...1 9 GENERAL INFORMATION 1 SAE Tap Drill Sizes Metric Tap Drill Sizes Decimal Equivalents ...
Страница 16: ...2 6 MAINTENANCE COMPONENT INSPECTION SERVICE LOCATIONS Front and Rear View ...
Страница 17: ...2 7 MAINTENANCE 2 RH and LH Side Views ...
Страница 42: ...3 2 ENGINE ENGINE SPECIFICATIONS Crankcase Exploded Views ...
Страница 43: ...3 3 ENGINE 3 Oil Pump Water Pump Engine Cover Exploded View ...
Страница 44: ...3 4 ENGINE Stator Cover Starter Water Pump Oil Filter Pressure Relief Exploded View ...
Страница 45: ...3 5 ENGINE 3 Cylinder Cylinder Head Piston Exploded View ...
Страница 104: ...NOTES ENGINE 3 64 ...
Страница 139: ...4 35 ELECTRONIC FUEL INJECTION 4 Fuel Injector PTO Circuit Fuel Injector MAG Circuit ...
Страница 140: ...4 36 ELECTRONIC FUEL INJECTION Engine Coolant Temperature Sensor ECT Circuit Engine Overheat Lamp Driver Circuit ...
Страница 142: ...4 38 ELECTRONIC FUEL INJECTION Throttle Position Sensor TPS Circuit Fuel Pump Circuit ...
Страница 230: ...NOTES FINAL DRIVE 7 36 ...
Страница 250: ...8 20 TRANSMISSION TRANSMISSION EXPLODED VIEWS Shift Housing Transfer Case Exploded View Transfer Case Shift Housing ...
Страница 287: ...10 17 ELECTRICAL 10 COOLING SYSTEM SCHEMATIC Cooling System Break Out Diagram ...
Страница 307: ...10 37 ELECTRICAL 10 ELECTRICAL BREAKOUT DIAGRAMS 12V Key On Power Circuit Starting System Circuit ...
Страница 308: ...10 38 ELECTRICAL Instrument Cluster Circuit Transmission Switch Circuit ...
Страница 309: ...10 39 ELECTRICAL 10 Wheel Speed Sensor Circuit AWD Circuit ...
Страница 310: ...10 40 ELECTRICAL Fuel Gauge Display Circuit Cooling Fan Circuit ...
Страница 311: ...10 41 ELECTRICAL 10 Charging System Circuit ...
Страница 312: ...NOTES ELECTRICAL 10 42 ...