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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Crankshaft Position Sensor: Description and Operation

The sensor consists of magnet and coil. It is mounted on oil pan with specified air gap between the sensor core end and crankshaft timing belt pulley tooth.

As the crankshaft turns, AC voltage (pulse) is generated in the sensor.
ECM (PCM) uses this signal as;
- a data to calculate the engine speed
- one of the signals for cylinder identification
- one of the signals to monitor occurrence of a misfire