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
If it fails: lemon-manuals.org.ua

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Coolant Temperature Switch (For Computer)

The coolant temperature switch (CTS), is mounted in the radiator and senses coolant temperature within the radiator assembly. The switch is closed below 63°F. This information is sent to the ECA for use in increasing fuel injection amount at low temperatures.