Waveform 7

Knock sensor

WAVEFORM 7 (KNOCK SENSOR)

ECM Terminal Names	Between KNK1 and EKNK
Tester Ranges	0.01 to 10V/DIV, 0.01 to 10 msec./DIV
Conditions	Maintain engine speed 4,000 RPM after warming up engine

HINT:

The wavelength becomes shorter as the engine RPM increases.
The waveforms and amplitudes displayed differ slightly depending on the vehicle.

Fig 1: Identifying Knock Sensor Waveform