VAFC2 Install in a 2001-2005 Civic

[Mikey]

Contrary to what people say. VAFC2 is the only one that will work on our 7th gen cars running D17 engines and vtec.One day I was doing a head swap into my DX and putting a EX head so i would have vtec capabilities and needed the wiring diagram for our cars.. as i was doing the install i notcied that not all the wires were being connected and used considering APEXI doesnt have the proper diagram for our cars... Which in turn is why i created this full install...

With that in mind, while installing the unit i noticed that the manual that came with the thing does not have our car model listed but it does have our engine D17 listed... its listed as EU3 or EU4 in the book which says to use diagram H8-a... this is wrong.. it will get u the right install but not all the wires connected.. yes i know its missing the VTM wire... but it is also missing another wire.. the TDC wire.. when installing the VAFC2 u should follow diagram H7-b which shows u were to connect the VTM wire and TDC wire.. but DO NOT connect the VTC CAM SIGNAL wire cause we do not have that on our cars... that wire on the ECU is for the Secondary 02 Sensor and not the VTC.. just tape it off and put it to the side cause its the only wire that wont be used.... the diagram also shows where to connect the VTM wire..Basically u are using a combination of diagram H8-a and H7-b to complete the install.. After creating this install guide GEARBOX has also gone back and redid his wiring to connect the rest of the wires.. He also has gone and made a modified version of Diagram H8-a which shows the rest of the connections.... My car runs fine and so does gearbox and hope this helps with everyones install.

Here is a diagram of the pinouts where everything should go. Its a PDF file

01-05 Civic vafc2 wiring

The second piece of info you need to install this thing is the vafcII harness color code from the manual. This will show you how to match up the harness wires to the ecu wires. This diagram is ONLY for showing what each color means and whether the wire should be cut or spliced.


INITIAL SETUP PROCEDURE--Very Important!!

Just after the install is done, you need to set certain functions in order for the vafcII to work with your car. As far as I know, these will work for a D17 1.7L SOHC VTEC engine on 2001-2004 civic EX.

If you started the car without performing this setup, you will need to reset the ecu and start over.

After the install, turn the car to the ON position but do not crank the engine. The vafcII display should now be active.

1) Sensor number IN 06 OUT 06
2) Number of cylinders = 4
3) Throttle position = arrow pointing north-east
4) Vtec number = 3
5) hold down accelerator for 10 secs, then release for 10 secs

Turn off the car and remove the key to save settings. It is now safe to start the car for the first time. There should be no check engine light at all.

DO NOT ever adjust any vafcII settings when the engine is running!! All changes including vtec engagement and fuel tuning must be made when the car is on, but engine is off, as described above.

It is strongly recommended that a dyno be used to measure and adjust the air/fuel ratio for your vehicle. The ideal ratio is 14.7:1 which is best for combustion and emissions.

As a general rule, our cars tend to run lean in the lower rpms and rich in the upper rpms, although this is not always true.

Rule of thumb everyone... If u can... SOLDER the wires together cause based on exerperience i have had it where the connectors they provide come loose.. and it has happened to me on my 98 civic and actually blew my ecu... if u cant do it during the install now then u might want to put that on ur TO-DO-LIST for the future.

[H22Killa]

Mike knows his wiring

[1fasteg6]

Do you know how to sire vafc to most hondas?

[1fasteg6]

I meant wire

[Mikey]

Originally Posted by 1fasteg6

Do you know how to sire vafc to most hondas?

almost any car.. i got wiriing color codes and so forth for almost every import car

[sleepee]

you use alldata or any other online resource like that?

i'm gonna need to get a wiring diagram for a certain car, and if you could help me out that would be great. PM me and let me know please..

[Mikey]

i got many resources.. especially helms manuals and so forth.. what car?

[juniem]

hi, i'm newbie here. I found a lot of very useful info's from this site.
One question about this thread. The wiring diagram i couldn't figure out what it looks like. Is it the ECU interconnection or front of ECU where connectors connected does anyone had an actual pics where the connection made?
Is there any issue so far after the installation? you know i wanted to make sure everything work in perfect condition, I have only one car to go to work and maybe after this project I don't have car at all because i mess up the connection.
Thanks in advance for any help.

[Mikey]

tje diagram u are looking at is the way as if you were looking at the connector from the back side where all the wires are coming out

[juniem]

So you mean to say that's the wires of ECU where i'm going to tap the wires from the VAFC2. correct me if my wrong.