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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Crankshaft Position Sensor: Description and Operation

This combined sensor provides separate signals to the ECU to calculate both ignition angle and fuel injection. To accomplish this, an inductive sensor mounted on the front of the engine block monitors rotation of a special sprocket installed on the crankshaft.