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.
2012 Scion iQFACTORY OEM SERVICE PROCEDURE
Engine Coolant Temperature Sensor: Inspection: Inspection
- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
- Partially immerse the sensor in water and warm up the water.
- Measure the resistance according to the value(s) in the table below.TEXT IN ILLUSTRATION
*a Component without harness connected
(Engine Coolant Temperature Sensor)*b Acceptable Standard Resistance
Tester Connection Condition Specified Condition 1 - 2 Approximately 20°C (68°F) 2.32 to 2.59 kΩ Approximately 80°C (176°F) 0.310 to 0.326 kΩ NOTE:When checking the sensor in water, keep the terminals dry. After the check, wipe the sensor dry.
If the result is not as specified, replace the engine coolant temperature sensor.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.