Stratus L4-2.4L VIN X (1998)
Knock Sensor: Testing and Inspection
The engine knock sensor is affected by a number of factors. A few of these are:
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Ignition Timing
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Cylinder Pressure
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Fuel Octane etc
The knock sensor generates an AC voltage whose amplitude increases with the increase of engine knock.
The knock sensor can be tested with a digital voltmeter.
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RMS voltage starts at about 20mVac -- at about 700 rpm
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and increases to approximately 600 mVac -- at 5,000 rpm.
If the output falls outside of this range a DTC will be set.