Safc 2 Knock Sensor

[stenve]

I have an rb25det series 1. finished hooking up the safc2 and all is working fine.

i have one query about the knock sensors though.

there are 2 knock sensor wires on the ecu one for cyl 1-3 and one for 5-6?? is this right?

to my knowledge there is only 1 knock sensor wire on the safc, do i need to tap into both of these wires? or is there a second knock wire from the safc2?

i have the knock sensor wire from safc tapped into one of the ecu knock sensors atm, but do not get any knock readings on the safc.

i assumed there would be a small amount of knock or is it because ive hooked it up wrong.

can someone please help me out with this and clear it up??

Thankyou

[RaZ_TuRbO]

I think i tapped mine both in...cant really remember.

[stenve]

do you mean tapped both the ecu wires into one safc wire?

[ZENNON]

doesn't SAFC-II have 2 knock wires?

[ZENNON]

DIY by predator by help: http://www.skylinesaustralia.com/forums/Sa...3-G-t85232.html

[stenve]

  ZENNON said:

doesn't SAFC-II have 2 knock wires?

thats what i thought but not sure cos i havent got the manual or anything with me at work.

i'll check that diy too thanks mate

[stenve]

  ZENNON said:

doesn't SAFC-II have 2 knock wires?

thats what i thought but not sure cos i havent got the manual or anything with me at work.

i'll check that diy too thanks mate

[ZENNON]

APEXI DOCUMENTATION

Includes: Installation Manuals, Wiring Manuals, Technical FAQs

http://www.apexi-usa.com/support_main.asp

[stenve]

  ZENNON said:

APEXI DOCUMENTATION

Includes: Installation Manuals, Wiring Manuals, Technical FAQs

http://www.apexi-usa.com/support_main.asp

thanks zennon i have that printed out at home, but found it pretty much all over the shop and confusing. ill try and have a read through it again.

but from what i can see there is 1 wire from the safc for knock and it needs to be tapped into both knock wires on the ecu.

[ZENNON]

Yeah know what you mean with the dodgy documents...

I'll be installing one in my 32 within the month so hopefully I can figure it all out!

[stenve]

yeah as a whole its fairly easy, was just this knock sensor thing im a little unsure of.

just make sure all your connections are sweet. the splitters i used werent the best for the job and made a dodgy connection. caused me a bit of trouble.

[stenve]

double post

Edited April 17, 2008 by stenve

[ZENNON]

  stenve said:

double post

2nd one in the thread - you're on a roll!

[QWK32]

nah the safc doesn't have two knock wires, just one. you need to get a multimeter and probe into both of the knock sensor wires at the ecu when the car is running. the one that has the higher voltage is the one you splice into.

[stenve]

  ZENNON said:

2nd one in the thread - you're on a roll!

haha i didnt even notice the other one. slow day at work today... my brains not working

awesome thanks qwk32 i'll check that out.

should an untuned rb25det be getting a small amount of knock? it shouldnt always be at zero should it? i may have read that wrong somewhere though

[QWK32]

you will get a small knock reading. just normal engine noise coming through.