Knock Sensor (KS) PCM Input

Knock Sensor (KS) PCM Input
The knock sensor (KS) system is comprised of a knock sensor and the PCM. The PCM monitors the KS signals to determine when engine detonation occurs. When a knock sensor detects detonation, the PCM retards the spark timing to reduce detonation. Timing may also be retarded because of excessive mechanical engine or transmission noise.