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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Camshaft Position Sensor: Description and Operation

Crank Angle Sensor:

The Camshaft Position (CMP) Sensor located in the distributor consists of the signal generator (pickup coil and magnet) and signal rotor.

As the signal rotor turns, AC voltage is generated in the pickup coil which varies in a pulsating way. This pulse signal (3 pulses/revolution) is sent to the ECM where it is used to calculate the engine speed and also as one of the signals to control various devices.