WRX wrx WRX

Got an Apexi S-afc for my 95 Wrx, wired it in as per diagram, turn ignition on buttons illuminate, screen will come on when button pressed but will only stay on with finger on the button and so cannot put any of the settings in.I have read the manual but there's never that bit of info you want is there!! As far as i can see i have wired it in correctly and double checked it all.
Has anyone had any experience installing these things??
Am i stupid and missing something obvious??
Any help/info,comments, much appreciated.

Delboy2

Errm sounds to me like it is wired incorrectly. When the ignition is switched on the Apexi should light and do a start up initiation displaying APEXI and finishing with parameters on the screen. I do have some piccies of the start up as I currently have one which I am going to sell - I will dig them out and post em up for you.

WRX wrx WRX

Cheers for that,i'll check wiring again. Someone mentioned that it may be a dodgy earth connection???

Delboy2

Yes there are 2 earths. Have you looked at this HERE

This is the start up sequence :-






Cheers


[Edited by Delboy2 - 1/14/2004 9:02:55 PM]

WRX wrx WRX

Yep, printed off all 50 pages of the manual.It does the introductory thing when you hold the button. I made sure i got the earths the right way round (brown nearest ecu) and the wiring for the air flow signal the right way round.I'll check all the wiring see if they have good contacts and see what happens.

tweenierob

WwW, the unit should power up and do intro just be switching ign on.

It sounds like a common prob with the Apexi units, use a seperate earth for each earth connection to the unit (ie. one from ecu for sensor earths and one from the chassis for power up earth). This normally sorts out the problem.

Rob

WRX wrx WRX

Tweenierob - do you happen to know which ground wire i should earth to the chassis, brown or black, or does it matter which.
Thankyou so much for the info

Delboy2

Brown would be best suited in the loom very close to the ECU as this is the sensor GND. The Black could be earthed to the chassis of the car close to the ECU as this is the Apexi's GND.

WRX wrx WRX

Cheers!!! I'll try that route then. Ive checked all wiring and connections several times over now and cant see anything thats wrong so i'll try earthing the black wire to the chassis and see what happens.
Thanks again folks.

WRX wrx WRX

Hmmm, still no joy, any other suggestions? (stamp on it springs to mind)
Whats the chances of the unit been faulty? Anyone elses gone wrong?
I aint no auto- electrician but after checking all the wiring against the diagram in the manual at least 7 times, i'm fairly confident that its all in the right place.It does the introductory thing if you hold the button down but just goes off when you let go so its definately got power to it, would it still do this if the earth connection was dodgy?

Delboy2

Is the unit new or second hand?

jameswrx

iTrader: (4)

Hi Matt, YHM

As people have stressed on here (and me in my emails to you), the wiring is critical. I know you have checked, but I have had this many times when first fitting the SAFC (new and used the same).

The fact that it comes on when you are pressing buttons points to the unit working, but a poor connection is still my guess.

All I can say is to make sure (where the SAFC wiring splices the ECU wires) that the wires are touching a solid connection. Open the splicers up and pull the plastic wire coating away slightly on both the ECU wiring and the SAFC wiring. I know it may seem like flogging a dead horse mate, but it should work.

I guarantee the unit. If you still can't sort it, send it back to me and I'll refund you in full no problem mate. If I get the unit back and find it to be faulty, I will send you a brand new unit to make up for any inconvinience mate, but I'm 100% it's fine, it was tested on my own car.

James

timmyjmy93wrx

Go easy on me......

What is the purpose of this? Does the Apexi just measure whats going on i.e airflow and revs etc?

Sorry to ask a thick question but what do they do!!!

Delboy2

Its an 8 point adjustable air-flow computer which can be adjusted on low and high throttle to +/- 50%

little'un

iTrader: (9)

The wires should'nt be earthed to the chassis remember - are u using the earth on the ECU multiplug??? Don't forget the brown and black have to be at least 1cm away so there is no interference..

If you've got the manual - RTFM..., it's not too bad to install..



PS - My other half's fitted mine and he's offered to fit yours too.

[Edited by little'un - 1/16/2004 12:48:20 PM]

WRX wrx WRX

Problem now sorted, thanks to all for your input.
Just one last thing. When setting it up can anyone confirm what should be entered under the "sensor number selection" i know it is the HW-10 but what is suppost to be entered on this screen
IN OUT
01 01

little'un

iTrader: (9)

If your sensor is HW-01, then set both the input and output values to 01

WRX wrx WRX

Thanks for that "little'un"
Thank your other half for the kind offer aswell