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 MANUALSMITSUBISHI2009LANCER L4-2.4L (4B12)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSENGINE COOLANT TEMPERATURE SENSOR CHECK
2009 Mitsubishi Lancer L4-2.4L (4B12)
Engine Coolant Temperature Sensor Check
2009 Mitsubishi Lancer L4-2.4L (4B12)SECTION Engine Coolant Temperature Sensor Check
ENGINE COOLANT TEMPERATURE SENSOR CHECK
Required Special Tools:
- MB992042: Engine coolant temperature sensor wrench
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 using the special tool MB992042 (engine coolant temperature sensor wrench).
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 kohms[at 60 °C (140 °F)]
0.26 - 0.36 kohms[at 80 °C (176 °F)]
3. If resistance deviates from the standard value greatly, replace the sensor.
4. Apply LOCTITE 262, Three bond 1324N or equivalent to threaded portion.
5. With the special tool MB992042 (engine coolant temperature sensor wrench) tighten the engine coolant temperature sensor to the specified torque.
Tightening torque: 30 ± 9 N.m (22 ± 6 ft-lb)
Required Special Tools:
- MB992042: Engine coolant temperature sensor wrench
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 using the special tool MB992042 (engine coolant temperature sensor wrench).
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 kohms[at 60 °C (140 °F)]
0.26 - 0.36 kohms[at 80 °C (176 °F)]
3. If resistance deviates from the standard value greatly, replace the sensor.
4. Apply LOCTITE 262, Three bond 1324N or equivalent to threaded portion.
5. With the special tool MB992042 (engine coolant temperature sensor wrench) tighten the engine coolant temperature sensor to the specified torque.
Tightening torque: 30 ± 9 N.m (22 ± 6 ft-lb)
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.