Knock Sensor Inspection

Reference: KNOCK SENSOR REMOVAL AND INSTALLATION 

1. Disconnect connector (2) from knock sensor.
2. Connect oscilloscope (1) as shown in figure.
   Fig 1: Checking Knock Sensor

   Courtesy of SUZUKI OF AMERICA CORP.
3. Check that knock sensor signal (1) shows the following waveform when cylinder block is given a shock by plastic hammer.

   If faulty condition is found, replace knock sensor.

   Fig 2: Waveform Graph For Knock Sensor Signal

   Courtesy of SUZUKI OF AMERICA CORP.