Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Sensor Inspection

Checking The Coolant Temperature Sensor Resistance:





1. Remove Engine Coolant Temperature Sensor from the intake manifold.
2. With temperature sensing portion of engine coolant temperature sensor immersed in hot water, check resistance.

Temperature Resistance
°C (°F) (k ohms)


0 (32) 5.8
20 (68) 2.4
40 (104) 1.1
80 (176) 0.3

3. If the resistance deviates from the standard value greatly, replace the sensor.