I am planning on buying an Apexi S-AFC II from Ebay and would like to know if anyone has already installed one or knows a link to a write-up for it. I have the write-up for the older version Apexi S-AFC I, but since the new one has a knocking monitor I figured the wiring will be a little different. Can you guys help me out since I didn't get any replies in the 4th gen forum? Thanks.

-Ben

 

Hahaha.. I just got mine and need a write up as well..
I emailed the seller for an English version of the wire diagram.. Let's see if he sends it or not..

 

Crud... mine is on its way but I was sorta hoping for an Engrish manual and not just japanese.. aaaaaaaaaarrrrrrgh!

All we need to know is where that Knock Sensor wire is..

 

Look at the ECU diagram.

 

Hmm..... ECU diagram eh... for some reason I didn't think I'd find one in the car (though now that I think about it, I realize I think I saw it there last time lol..duuuh).

Jer needs to wake up.

 

Post installation up in Japanese up and I can have someone translate it...I have the original one S-AFC and it seems only a couple more wires will have to be tapped but realize though the application "may or may not " work for our cars...they are best suited for SR or RB turbo motor controls from the info listed in the booklets...I was reading them again the other day.

 

http://boostedmaximas.com/ecu_pins.jpg <~~ 5th gen S-AFC I and RSM

Just find the knock pin and you're all set.

 

Someone also suggested I get an aftermarket KS and pop it in next to the factory one.. but feh, I trust the factory sensor well enough for now.

I've also learned today that I am an even bigger stupidhead than I originally thought : would you believe that about 20 minutes ago I came to the realization that 14:7 a/f ratio is what is safe for n/a cars ONLY, and that I should be running 12:5!?!?!?



I've been at 12.7~13... beh it could be worse... I don't think I broke anything yet and I've taken it easy on the boost since getting the 3.33". I REALLY need to find a wideband o2 a/f gauge that doesn't cost upwards of $700+

On the downside I guess that 268fwhp/231lbs-ft (SAE) figure will go down once I turn that mixture to the rich side.

 

A knock monitor function, cool!

What is the scale?
Is their a sensativity setting?
Any more info on this function?

 

link no workie workie!

 

Oops...




Matthel and I jokingly said that it won't send out a warning until your motor has blown.


Fixed, but remember it's for a 5th gen.

 

Here is how the wire looks..



11 wires..

Now, how many wires on the original afc??

 

It's not a matter of how many, it's a matter of which one is for what. Obviously there are less on the S-AFC because there is no KS wire, so we could say that's at least one less

I think it would be better if you could scan the manual and let someone translate which wire is which (I'm assuming there's no labels and/or no abbreviations anywhere)

 

Just like the S-AFC, you will not use all 11 wires. Here's what you will use:
- power (ignition)
- ground
- MAF
- RPM
- TPS (throttle position sensor)
- Knock
- there may be more from the new feature

 

I think it has two ground wires... but feh I'll see when I get it.... I'll give one of my japanese schoolgirls a call to translate

 

Here is the PDF's of the two manuals available from the Japanese site.

WizzaMax if you can get it translated it would be appreciated.

Jim

http://members.rogers.com/maximase/S-AFCIIa.pdf
http://members.rogers.com/maximase/S-AFCIIb.pdf

 

I found the Japanese manuals more useful than the English ones! That's how I figured out the Dec-Accel function for the BOV. It will probably be almost identical to the S-AFC I with the exception of the knock and maybe one or two other things. You might want to start there in the absence of English ones for the S-AFC II

 

I already have the English for the S-AFC I and the Japanese ones that came with the S-AFC II but its mostly the knock hookup I want the info on.

You are right there is a lot of readable info in the Japanese manuals though.

 

Bump.......

 

Yes there are two ground wires and you must follow the instructions on how to tap into the ground on the ECU. One must be closer than the other.

 

Here I just did write up on this for my Lexus. I'm going to use E-Manage for the Maxima. If you need an S-AFC II let me know. I have both regular and limited Editions in stock.

SAFC II
Red - power
Green - rpm signal
Gray - Throttle signal (TPS)
Brown - Ground
Black - Ground
Yellow - A/F Output (this goes towards the ECU)
White - A/F Input (goes away from ECU)
Blue - can be used as O2 sensor voltage meter. Hook up to one of the primary O2 leads.
Pink Not used (Used on Karman vehicles)
Orange Not used (Used on Karman vehicles)
Purple - Knock
I was told Karman is for vehicles like VW.

All you need is a Maxima wiring diagram and you're all set. As someone mentioned the brown ground has to be at least a cm closer to the ECU than the black ground. Solder all connections. Do NOT use any clips or crimp connectors. Wrap everything in electrical tape. They work great BTW!!!

 

vampire taps won't work??
so is the safc2 setup basically the same as the safc1 setup, minus the knock sensor? i sold my safc1 and i'm about to order the safc2 and i was thinking of connecting the same wires + 1 knock sensor wire. hopefully they're the same colors as the safc1.

 

Don't use those cheap connectors. They always cause problems eventually. Just solder them. It's not that hard. S-AFC II wiring diagram is above. Should be same wires as S-AFC I with the addition of the knock sensor.

 

Here is a picture for those of us who need a graphical aid. This is for a 97 so check to make sure your ECU has the same pinout.

Thanks to Guru for the wiring pinout of the S-AFC II.



Here is a bigger picture for the seeing impaired.
http://members.rogers.com/maximase/ECU.jpg

 

How about for the 2000 and up?? Is it the same??

 

Ok now this is what I truly was looking for. Thanks for posting this. It now makes me wanna go sell my s-afc I for the one you guys have. I think I'll go place an order sometime this week. Thanks again.

 

You will have to check the pinout of the ECU, the rest is the same.

 

Anyone got the wiring diagram available for 2002-2003? I'll find what I need but I need the diagram. Thanks!

 

Never having done this before, I have one question :

What do you mean exactly by "1cm away from the ECU" I would assume we're grounding the brown/black wires away from the ECU anyways; the diagram has confused me more into thinking that we're grounding them INTO the ECU

Please help, me no electrical whiz

 

Ok, on the 97 pins 54 and 55 are for the MAF. 54 is the MAF signal and 55 is the ground wire for the MAF.

The brown and black wires from the S-AFC II hook up to that ground wire for the MAF which connects to pin 55 on the 97.

The Brown wire goes closest to the ECU, exact position is not critical. The Black wire is connected 1 cm from the Brown wire. That distance is critical.

 

Gotcha I wanted someone to repeat the black/brown part to me again

I may install this thing next week.. I'll see!

 

Ok, so I went ahead and ordered the S-AFC II from Ebay and the tracking number says it'll be here on the 5th, so excited. Now I have to find a buyer for my S-AFC I. I've been taking a look at the wiring diagram, and I was wondering how the blue wire O2 sensor hookup is actually done. So there's 2 O2 sensors, but there is only 1 blue wire according to the actual colored wire picture above, how would I hook this wire up? I guess I would have to pick either the left or right O2 sensor pin?
-Ben

 

Yes, you got it. Either one will work according to all the info I have on it.

 

Do both sensors give out the same reading or is there going to be a fluctuation somehow between the 2? I'd like to pick the one that seems to be the more accurate one.

 

They aren't going to give exactly the same reading. One is for the front 3 cyls and the other is for the back 3 cyls.

They should be close but that depends mostly on the condition of the engine and if all 6 cylinders have very similar compression pressures and all injectors etc are working exactly as they should.

I think its like a coin toss, pick one and hook it up.

 

I have been folowing this thread and have a few questions before I make a purchase I might regret. First will this be a good mod for a 2k2 non turbo? I am nervous about getting it all put in and then not knowing what settings to adjust and not adjust and F-ng up the engine. I am an acft mechanic so the install will be simple it's just I don't understand the operation of it. Any help would be greatly appreciated.

 

If you aren't going to do boost of some sort don't waste your money.

I bought it to make boosting safer rather than getting extra HP even though that would be a nice byproduct.

 

I wouldn't mind going to boost but where can I get the kit from?

 

Lots of places, a good one to start would be Avalon Racing (avalonracing.com/net or whatnot). I got mine from Yankee!!!

AFC2-wise look here :
http://forums.maxima.org/showthread....hreadid=191360

 

I figured I post here to get more responses than starting another thread. For those of you with an s-afc, especially 4th gens, where are you mounting your S-AFC? I was thinking of mounting mine on the center console in the little spot between the shifter trim and the cupholder, facing it upwards. In that place, I'll mount velcro on the back of the s-afc so I can remove it when I decide to leave the car. I think as of right now this is the most expensive item in my interior. I was also thinking of putting it facing up in one of my slide-out trays, but I was thinking I might be able to see the display too good. I'd like to mount it right next to my a-pillar gauge pod, but then I wouldn't know how to remove it easily for security purposes. Anyway, if you guys have pics of your installs, please help me plan my install. I should be starting the install tomorrow night.

-Ben