Crankshaft (7X) Sensor (2.2L & 2.4L)

The 7X signal is generated by a PM generator crankshaft sensor which is mounted through the side of the engine block. See CRANKSHAFT POSITION SENSOR  . The PCM uses this signal from the electronic Ignition Control Module (ICM) to calculate engine RPM, crankshaft position and injector pulse width. Engine will not start or run if this circuit is open or grounded. A problem in this circuit will also set a related diagnostic trouble code.