Park Avenue V6-3.8L SC VIN 1 (2005)
Crankshaft Position Sensor: Testing and Inspection
CRANKSHAFT POSITION SENSOR (CKP) SYSTEM DIAGNOSIS
CIRCUIT DESCRIPTION
The ignition control module (ICM) monitors the crankshaft position (CKP) sensor sync signal when the engine is cranking. The CKP sync signal is
passed from the CKP sensor to the ICM on the CKP sensor 2 signal circuit. The CKP sync signal is used to determine the correct cylinder pair and
initiate the ignition coil firing sequence. The 18X reference pulses are passed from the CKP sensor to the ICM on the CKP sensor 1 signal circuit. The
18X reference pulses are used for fuel injection and ignition control. After the ICM receives both signals, the ICM passes the 18X and 3X reference
signals to the powertrain control module (PCM). The camshaft position sensor and the CKP sensor share a 12-volt reference and a low reference
circuit. The CKP sensor consists of the following circuits:
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A 12-volt reference circuit
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A low reference circuit
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A CKP sensor 1 signal circuit
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A CKP sensor 2 signal circuit
TEST
