Hi dragon8227,Welcome to 2carpros and TY for the donation.
Knock Sensor location
1.Disconnect knock sensor harness connector.
2.Check resistance between terminal (2) and ground. Approximately 500 - 620 KOhms [at 25 C (77 F)]
*It is necessary to use an ohmmeter which can measure more than 10 MOhms.
Do not use any knock sensors that have been dropped or physically damaged. Use a new one.