Component Inspection

WARNING: This page is about a different car, the 2021 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.

Component Resistance Check

Check Item	Specifications	Check Condition	Terminal (+)	Terminal (-)
Resistance at 20° (68°F)	Approx. 5MΩ	Ignition switch is turned "OFF"	Signal terminal of Knock Sensor	Ground terminal of Knock Sensor

Output Signal & Installation Torque Check
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
4. Check the installation torque of the knock sensor.
  Specification: Approx. 16 ~ 28N.m (160~250 kg.cm, 11.8~18.4 lb.ft)
5. Has a problem been found?
  YES
  - Check knock sensor for contamination, deterioration, or damage. Substitute with a known-good sensor and check for proper operation. If the problem is corrected, replace sensor and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
  NO
  - Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure