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Home >> BMW >> 1982 >> 633CSi Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> BMW MOTRONIC Emission Control System >> Operation >> Data Sensors >> Reference Point Pick-Up Sensor

Reference Point Pick-Up Sensor

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This sensor is located in the bellhousing, next to the ESS. It supplies the MCU with piston position information. When the MCU has determined optimum ignition timing (based on input from various sources) information supplied by the reference point pick-up sensor is used to signal ignition firing.