TDC/Crank/CYL Position Sensor

This sensor is used on Civic Wagon with 1.6L engine and CRX HF and Si models with multi-point sequential fuel injection. The crank circuit portion of this sensor determines the fuel and ignition system timing for each cylinder, and also relays engine speed information to the ECU.
The TDC circuit portion of this sensor determines ignition timing during cranking only, and whenever the crank angle sensor is providing abnormal signals.
The cylinder position circuit portion of this sensor determines the position of the No. 1 piston, to properly time the sequential fuel injection to each individual cylinder.