Concorde V6-2.7L VIN R (1998)
Knock Sensor: Description and Operation
Fig 15 Knock Sensor
KNOCK SENSOR-PCM INPUT
Engine uses a single knock sensor. The sensor monitors both the right and left bank of cylinders. The sensor mounts into the side of the engine
block. When the knock sensor detects a knock in one of the cylinders, it sends an input signal to the PCM. In response, the PCM retards ignition
timing by a scheduled amount.
Knock sensors contain a crystal which constantly vibrates and sends an input voltage (signal) to the PCM while the engine operates. As the
intensity of the crystal's vibration increase, the knock sensor output voltage also increases.