Wiring Knock Sensors Directly To Ecu

[Hibino]

Hey guys,

I've got a 25 neo in my R32. Got a loom spliced together as part of the engine package. All works great except when I went to get it tuned the tuner said the knock sensors weren't working. I can't remember whether we (my brother and I) used the 32 or the 34 knock sensors but I've been told they should both work.

We're guessing the wiring in the loom somewhere is cactus so is there a way to wire them directly to the ECU?

Thanks!

[Simon-S14]

the knock sensor loom on rb25's is part of the alternator loom. so if you used the 32 alt loom then you'll have no knock sensors hooked up at all.

on the intake mani theres two big wite plugs.. one is for injectors and the other is for knock sensors... is it plugged into anything?

[Hibino]

Thanks!

I'll take a look in about 2 mins to find out. Yeah I think we used the 32 alt loom.

[Hibino]

White or grey plugs? Got a pic of them?

[Simon-S14]

grey plug... find the injector loom plug and it should be right next to that

[Hibino]

This? (red and white shielded wires)

I made a thread ages ago about them and no one was much help. It was hanging off my motor when I got it.

I assume this is the knock sensor wiring? Can I just hardwire the knock sensors to where this plug goes to normally?

[Simon-S14]

no its not the knock sensor wiring. i'll go take a pic.

[Simon-S14]

top plug is the injectors

bottom plug is for the knock sensor loom and solenoid under the intake manifold.

check to see if you have it plugged in.

[badhairdave]

You can wire them straight to the ecu, just dig out the pin out diagram and find the knock sensor pins. There's only a single wire off each sensor to hook up.

[Simon-S14]

true but the point is that in this situation i dont think its been wired in correctly.

so if he used a 32 alt loom, he's prob got no knock sensors hooked up.. if he couldnt get any then the easy way out would be to run two wires from each sensor to the relevant pins in that bottom grey plug. (rather then go all the way to the ecu)

[Hibino]

I've got a grey plug that goes to the injectors and another big grey plug that goes to the traction control (no butterfly in it so won't do shit).

That grey plug I posted up before was attached to the same place as where you've shown along with a brown and a black plug. The grey plug I've shown plugs into a grey (with purple centre) plug.

And thanks for your help both of you

Edited May 24, 2010 by Hibino

[Hibino]

bump for anyone to tell me what that plug is for?

Auto gearbox maybe?

[STATUS]

bump for anyone to tell me what that plug is for?

Auto gearbox maybe?

Thats 1000000000000000% the input shaft speed sensor loom for a R34 GTT tiptronic auto