5 Vz Fe Knock Sensor Location . Have to take the top of the motor off. The knock sensors are always located right where mice like to make home, and they always chew the wires usually right at the connector. 89 Toyotum Pickup 4x4 Wiring Harnes - Wiring Diagram Networks (Michael Ingram) If you are going in there replace the knock sensor wiring harness also as it fails more often than the. Here is another for your enjoyment. The knock sensor is basically a microphone, set to respond to the sound frequencies of engine knocks. Due to age and heating and cooling this wire can become aged and break internally You Recently Viewed. I am thinking of replacing it myself so I was wondering where the sensor was since I do not want to spend a lot. Toyota 4runner Knock Sensor Location 3SGTE Engine and Other Toyota Applications Repair Guides ...