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intensity of the crystal’s vibration increases, the The voltage signal produced by the knock sensor increases with the amplitude of vibration. The PCM The PCM ignores knock sensor input during engine idle conditions. Once the engine speed exceeds a Knock retard uses its own short term and long term memory program. Long term memory stores previous detonation information in its battery-backed RAM. The maxi- Short term memory is allowed to retard timing up to a preset amount under all operating conditions (as NOTE: Over or under tightening affects knock sen- REMOVAL 3.5L (1) Disconnect the negative battery cable. - ENGINE/MANIFOLDS/INTAKE MANIFOLD - REMOVAL) (3) Disconnect the electrical connector (Fig. 24). (4) Remove the knock sensor (Fig. 25). 3.8L (1) Disconnect the negative battery cable. Fig. 24 KNOCK SENSOR CONNECTOR Fig. 25 KNOCK SENSOR LOCATION Fig. 26 KNOCK SENSOR - 3.8L CS IGNITION CONTROL 8I - 9 KNOCK SENSOR (Continued) |