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Home >> Saturn >> 1995 >> SW2 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> RPM Reference Signal
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RPM Reference Signal

The RPM is monitored by PCM through tach/pulse signals (circuit No. 430) produced by either the ignition control module or crankshaft position sensor (Hall Effect signal on C(3)I, PM generator signal on DIS and IDI). These signals are used by PCM for determining control of timing, fuel delivery, EGR function and idle speed.

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