Knock Sensor Inspection

Remove knock sensor. See KNOCK SENSOR REMOVAL AND INSTALLATION .
Connect multimeter (1) to knock sensor (2) as shown in figure.
Check that knock sensor resistance and capacitance.
If faulty condition is found, replace knock sensor. See KNOCK SENSOR REMOVAL AND INSTALLATION .

Fig 1: Checking Knock Sensor Resistance
Courtesy of SUZUKI OF AMERICA CORP.

Knock sensor resistance

Infinity

Knock sensor capacitance

850 - 1150 pF