Question about 2004 Saturn VUE
Vehicle sat for a year without use
Hey Bob how's it going ? What engine does it have 2.2 3.5 L ? An how did you test for current ? This is a AC voltage .
The crankshaft position (CKP) sensor is a permanent magnet generator, known as a variable reluctance sensor. The CKP sensor produces an AC voltage of different amplitude and frequency. The frequency depends on the velocity of the crankshaft. The AC voltage output depends on the crankshaft position and the battery voltage. The CKP sensor works in conjunction with a 7X reluctor wheel attached to the crankshaft. The CKP sensor produces seven pulses for each revolution of the crankshaft. The pulse from the 10-degree notch is known as the sync pulse. The sync pulse is used to synchronize the coil firing sequence with the crankshaft position. The CKP sensor is used for ignition timing, the fuel injector timing, misfire diagnostics and tachometer display. The CKP sensor is connected to the ECM by a signal circuit and a low reference circuit.
The best way to test is with a lab scope !
Crankshaft position sensor
Posted on May 02, 2015
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Posted on Jan 02, 2017
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