1.
Component resistance inspection
(1) Ignition Off & Engine Off
(2) Disconnect knock sensor connector
(3) Measure resistance between terminals 2 and 1 of the sensor connector(C38-2)(To knock sensor).
1)
Specification : Approx. 5㏁ at 20℃(68℉)
Component resistance inspection
(1) Ignition Off & Engine Off
(2) Disconnect knock sensor connector
(3) Measure resistance between terminals 2 and 1 of the sensor connector(C38-2)(To knock sensor).
Specification : Approx. 5㏁ at 20℃(68℉)
Output signal inspection
(1) Remove knock sensor from vehicle and secure (across mounting boss) in a shop vise. Set up an oscilloscope and attach negative probe to knock sensor pin #3 and positive probe to sensor pin #2. Set time to 0.5 seconds and voltage to 0.2v. 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
Installation torque inspection
(1) Check the installation torque of the knock sensor.
Specification : Approx. 16 ~ 28N·m(160~250 kg·cm,11.8~18.4 lb·ft)
Are measurements OK?
YES
Thoroughly check connectors for loose or poor connections, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure
NO
Test with a new knock sensor and check for proper operation. If problem is corrected, replace knock sensor and go to "Verification of Vehicle Repair" procedure
