Skylark L4-144 2.4L DOHC VIN T SFI (1997)
Crankshaft Position Sensor: Description and Operation
Crankshaft Position (CKP) Sensor 7X
Crankshaft Active Counter
This signal is called a 7X reference signal because a pulse occurs 7 times per crankshaft revolution. The PCM uses this signal from the electronic
Ignition Control Module (ICM) to calculate engine RPM.
Scan Tool Display
A scan tool has two displays based on this input. One indicates crank RPM or simply that the PCM is receiving the 7X reference pulses while cranking.
The other indicates engine RPM while the engine is running. If the PCM receives an intermittent signal from the CKP, then the CKP Resync Counter
will increment.
Additional Information
More information about this signal may be found under Ignition System.
