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 MANUALSTOYOTA20094RUNNER LIMITED, 4.0 U, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEM (1GR-FE)ENGINE COOLANT TEMPERATURE SENSORINSPECTION
2009 Toyota 4Runner Limited, 4.0 U, RWD
Engine Coolant Temperature Sensor: Inspection
2009 Toyota 4Runner Limited, 4.0 U, RWDSECTION Inspection
- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
- Check the resistance.
- Using an ohmmeter, measure the resistance between the terminals.
Resistance
RESISTANCE SPECIFICATION TABLETester Connection Specified Condition 1 - 2 2.32 to 2.59 kΩ at 20°C (68°F) 1 - 2 0.310 to 0.326 kΩ at 80°C (176°F) NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to enter the terminals. After checking, wipe the water off the engine coolant temperature sensor.If the result is not as specified, replace the engine coolant temperature sensor.
- Using an ohmmeter, measure the resistance between the terminals.
- Check the resistance.
RENDER: 1.0x
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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.