1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, knock sensor diagram in Past Cadillac Vehicle Discussion; Does anyone have the diagram for the knock sensor? 99 deville...
- 10-19-12 12:08 AM #1Cadillac Owners Member
- Automobile(s): 1999 deville de elegance
- Join Date
- Apr 2012
knock sensor diagram
Does anyone have the diagram for the knock sensor? 99 deville
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- 10-19-12 11:12 AM #2
Re: knock sensor diagram
Simple circuit to the PCM - this is basically IT- the sensor itself is in the block valley, by cylinders 3 - 5. When it "hears" a specific frequency of engine sound the PCM retards spark slightly from the current advance value to stop the knock.