Component Inspection

P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

Inspection/Repair - Component Inspection

Component Inspection

1. Component resistance inspection
(1) Measure resistance between signal terminal and ground terminal of the sensor connector (Component side).

Specification : Approx. 5 MOhms at 20 °C (68 °F)




2. Output signal inspection
(1) Remove knock sensor from vehicle and secure (across mounting boss) in a shop vise.
(2) Set up an oscilloscope as follows :
Channel A (+) : Signal terminal, (-) : Ground terminal
(3) Rap on vise with a ball peen hammer while monitoring oscilloscope screen (there should be a spike of less than 1 volt with each hammer strike).

Specification : knock sensor send a voltage spike with hammer strikes




3. Installation torque inspection
(1) Check the installation torque of the knock sensor.

Specification : Approx. 16 - 28 Nm (160 - 250 kg-cm, 11.8 - 18.4 lb-ft)

4. Has a problem been found?