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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Fuel Injected Engine

Fig. 34 Coolant Temperature (TW) Sensor And Characteristics Chart:





This sensor is a temperature sensitive resistor (thermistor). The resistance of the thermistor decreases as the coolant temperature increases. This voltage signal is used to determine ignition advance timing, fuel mixture, idle speed, and purge control.