Crank Angle Sensor

On Accord and Civic models, crank angle sensor consists of a combination TDC/Crank sensor mounted in distributor housing. The ECU uses input from crank pick-up coil portion of this sensor to help determine ignition and fuel injector timing for each cylinder. This sensor also furnishes an engine speed (RPM) signal to ECU. The ECU uses TDC pick-up coil portion of this sensor to initialize ignition timing upon start-up (cranking) and when crank angle signal is abnormal.

Civic (except HF and Si models), also utilize a CYL sensor located on end of camshaft. Sensor consists of a single-lobed CYL trigger rotor and a CYL pick-up coil. The ECU uses input from this sensor to determine position of No. 1 piston for proper synchronization of injector firing for each cylinder. On Civic HF and Si models, a CYL pick-up coil is included in distributor housing along with TDC and CRANK pick-up coils.