5.13.1 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.
   Knock Sensor
   
   

   Component/System	Fault Codes	Monitoring Strategy Description	Malfunction Criteria	Threshold value	Secondary Parameter	Enable Conditions	Time Required	MIL Illumination
   Knock Sensor	P0327 P0332	Functional check (background noise lower than expected)	Signal output (Average of 3 samples)	< MAP values	Engine speed	> 2850 RPM	9 revolutions / continuous	two driving cycles

If the above table does not include details of the following enabling conditions: - IAT, ECT, vehicle speed range, and time after engine start-up then the state of these parameters has no influence upon the execution of the monitor.