Grand Prix V6-3.8L SC VIN 1 (1997)
Crankshaft Position Sensor: Description and Operation
Crankshaft Position (CKP) Sensor 3X
From the ignition control module, the PCM uses this signal to calculate engine RPM and crankshaft position at engine speeds above 1200 RPM.
The PCM also uses the pulses on this circuit to initiate injector pulses. If the PCM receives no pulses on this circuit, DTC P1374 will set and the
PCM will use the 18X reference signal circuit for fuel and ignition control. The engine will continue to start and run using the 18X reference signal
only.
