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.
2008 Mitsubishi Eclipse L4-2.4L (4G69)FACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
ENGINE COOLANT TEMPERATURE SENSOR CHECK
CAUTION: Be careful not to touch the connector (resin section) with the tool when removing and installing.
1. Drain engine coolant, then remove the engine coolant temperature sensor.
2. With the temperature sensing portion of engine coolant temperature sensor immersed in hot water, check the resistance.
Standard value:
14 - 17 kohms [at -20 °C (-4 °F)]
5.1 - 6.5 kohms [at 0 °C (32 °F)]
2.1 - 2.7 kohms [at 20 °C (68 °F)]
0.9 - 1.3 kohms [at 40 °C (104 °F)]
0.48 - 0.68 kohm [at 60 °C (140 °F)]
0.26 - 0.36 kohm [at 80 °C (176 °F)]
3. If resistance deviates from the standard value greatly, replace the sensor.
4. Apply 3M(TM) AAD part number 8731 or equivalent to threaded portion.
5. Install the engine coolant temperature sensor and tighten it to the specified torque.
Tightening torque: 30 ± 9 N.m (22 ± 7 ft-lb)
CAUTION: Be careful not to touch the connector (resin section) with the tool when removing and installing.
1. Drain engine coolant, then remove the engine coolant temperature sensor.
2. With the temperature sensing portion of engine coolant temperature sensor immersed in hot water, check the resistance.
Standard value:
14 - 17 kohms [at -20 °C (-4 °F)]
5.1 - 6.5 kohms [at 0 °C (32 °F)]
2.1 - 2.7 kohms [at 20 °C (68 °F)]
0.9 - 1.3 kohms [at 40 °C (104 °F)]
0.48 - 0.68 kohm [at 60 °C (140 °F)]
0.26 - 0.36 kohm [at 80 °C (176 °F)]
3. If resistance deviates from the standard value greatly, replace the sensor.
4. Apply 3M(TM) AAD part number 8731 or equivalent to threaded portion.
5. Install the engine coolant temperature sensor and tighten it to the specified torque.
Tightening torque: 30 ± 9 N.m (22 ± 7 ft-lb)
Factory Service Tools
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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.