Knock Sensor: Description and Operation

Knock Sensor

Description
The KV6 engine is fitted with one knock sensor to each bank. The knock sensors work by the piezo-electric effect, which is the excitation, created by movement caused by engine detonation. The ECM reads in this signal and makes the necessary A/F adjustments.

A fault is detected if:
1. The engine speed is greater than 2850 rpm and the noise level received from the sensor is lower than expected. The noise level is checked at every 240 degrees of crank for each sensor.