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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Component Inspection


1. Place coolant thermosensor into a container of water.
2. Install a suitable ohmmeter onto coolant thermosensor and measure resistance of coolant thermosensor.
3. With water temperature at 68° F., resistance value obtained should be 2-3 kilo ohms.
4. Heat water until temperature is approximately 122°F Resistance value obtained should be 700-1000 ohms. If resistance values obtained are not within the specified temperature ranges, replace coolant thermosensor.