Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSEAGLE1994SUMMIT WAGON AWD L4-1795CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)DESCRIPTION AND OPERATION
1994 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHC
Coolant Temperature Sensor/Switch (For Computer): Description and Operation
1994 Eagle Summit Wagon AWD L4-1795cc 1.8L SOHCSECTION Description and Operation
Engine Coolant Temperature Sensor:
Engine Coolant Temperature Sensor:
PURPOSE
The Engine Control Module (ECM) decides whether the engine is "cold" based on this sensor input and controls the fuel injection rate and fast idle speed accordingly.
OPERATION
The engine coolant temperature sensor is a negative temperature coefficient thermistor. It converts engine coolant temperature into a voltage for the ECM to read.
The ECM supplies a 5 volt reference and a ground for the sensor.
- When coolant temperature increases sensor output voltage decreases.
- When coolant temperature decreases sensor output voltage increases.
CONSTRUCTION
The Coolant Temperature Sensor is a thermistor type sensor.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.