. I have a 94 engine that I'm putting into my 90 runner. the knock sensor on the new engine has two wires and the knock sensor on the 90 wiring harness which I'm using has one. which wires do I connect to get it to work?

 

The left one.

Got pics? I dont recall a 2 wire knock sensor...

 

Haha on the left one...

I guess MudHippy knows a lot about these but from what I understand the 93 to 95 4runners have a two wire sensor. I will post pics tomorrow

 

Lean something new every day!

That funny. I was in that deep on a 92 and a 95, just missed it. Haha.

 

The knock sensor actually adjusts the timing so if you have it bypassed your truck could be running much better, and you will have a pesky code 52.

 

So nobody knows the answer to this? If anybody knows what the two wires do then I could figure out which one goes to ECU and wire it in that way. There's one brown one and one black wire. I just need to know which one goes the ECU thanks

 

You should be able to click image to make it larger, it shows where brown and black wire go. Good Luck

 

There is a signal wire and a ground wired for shielding of the signal wire. The signal wire is wrapped by the shielding wire.

 

Both types of knock sensor are 1 wire(for the sensor signal). Which is black for both types AFAIK.

88-91


92-95


From the 88 WD(see CONN S terminal 17).


Both types of knock sensor wires(the wires connecting the sensor to the wiring harness) are 1 wire on one end(sensor), 2 wire on the other end(wiring harness). So there's 2 terminals on the wiring harness connector(1 for the sensor signal wire, and 1 for the sheilding), and 1 terminal on the knock sensor connector(for the sensor signal wire...obviously).

88-91



92-95

 

So what you guys are saying that there is 2 wires that incorporate each other, thus making it a one wire sensor?

 

ever cut a coaxial tv cable? it'll look similar to that. The o2 sensor wired In the engine harness are the same way.

 

Yes I have and now I understand it. Haven't had to replace knock sensor pig tail yet. Thanks