Crankshaft Position Sensor (57X Signal)

The Crankshaft Position (CKP) sensor is a Hall Effect type sensor mounted at front of crankshaft sprocket. Front crankshaft sprocket has 57 teeth and plus a sync gap. CKP sensor will output and on-off pulse as each window passes the sensing element. CKP sensor is connected directly to PCM by a 12-volt reference circuit, a low reference circuit and a CKP sensor signal circuit. PCM uses CKP sensor signal to determine engine RPM. This signal is used to improve idle. If pump cam signal is lost, PCM will use crankshaft position signal data to control injection timing and fuel flow.