Safc2 install on my 1990 AWD talon problems

[blackjdm90]

Hey everyone. I bought a used Apexi SAFC-2 for 125 bucks so I thought I would give it a go. I have checked every thread on this site and the V-faq relating to it I have not found an answer so I figured that I am going to bring this to the threads!

So first off is that all of the threads and even Apexi's website have the wiring showing:
Red: as power
Brown: as ground
Black: as ground (farther away from the brown ground above)
Pink and Orange: as the MAF signal input and output (into the AFC and out of the AFC)
Gray: as the throttle signal (pin 19)
Green: as the RPM signal

Which everyone seems to be getting good results with BUT,

I have a problem these directions. I noticed right after I had started researching this, That my SAFC-2 has an 11 pin connector halfway through the harness and at this harness the wires change colors on the "ecu side" of the connector and there is no red wire? and on the "SAFC-2 side" of the connector it has all the wire colors I need.

So... My question is, Should I just go with what the colors are on the side of the connector coming out of the SAFC-2? I will upload a pic to see what you guys think. This has become a real nightmare trying to figure out what wires I am going to use to install this!

Sorry for the fuzzy picture but it gives you guys a better understanding of what my questions are. On this picture it shows the connector on the wires coming out of the SAFC2 and then the UPPER wires on this are the connection that would be going into the ECU. That would make each wire different colored but still have the same connection? So for example the far right pin, Shows the brown wire I would need for one of my grounds, and on the ECU side of this connector the color goes from brown to light greenish? so my main concern is if I just translate the color to its "new" color, would I be messing anything up? All of my connections will be soldered and heat wrapped once completed. Thanks for the tips and any feedback will be great. Thanks guys!

 

[viprez586]

Use the wires that will be connecting to the ECU, not the ones coming from the SAFC.
So, upper wires would be correct.

I used VFAQ Site - Visual Frequently Answered Questions to wire up mine...i believe it's the same colors for wiring...otherwise it's pretty self explanatory.

 

[xezerax]

Go with the colors off of the afc unit and not the jumper harness. If I remember correctly the afc1 harness and acf2 harnesses will snap together but they have different color pinouts and an extra wire, and judging from your photo you have 11 wires on the jumper side and 10 on the afc side. It looks like you have the jumper harness from an afc1.

 

[blackjdm90]

Go with the colors off of the afc unit and not the jumper harness. If I remember correctly the afc1 harness and acf2 harnesses will snap together but they have different color pinouts and an extra wire, and judging from your photo you have 11 wires on the jumper side and 10 on the afc side. It looks like you have the jumper harness from an afc1.

It has 11 wires coming from the jumper on both sides and I matched them up to what sense I could make from the V-faq wiring and I don't have any signal going to the safc2. I hooked up the power (red) wire to pin 102 on the 1g pinout I pulled off of V-faq. Then the grounds I hooked them up to Pin 101 on the same connection port of the ECU. did I hook them up to the wrong pins?! and the others are hooked up correctly to the MAF signal, RPM, and Throttle signal from the same ECU pinout I picked up from V-faq. Oh also my battery is dead and my alternator is fried from the exhaust dump off my wastegate so when I "tested" to see if the power to the AFC is correct, I had to jump my car from my jeep so would this give me a bad reading? if not, Is there anyone that could tell me exactly what pin they tapped the power and ground into for a 1990 AWD? thanks again for the quick replies also guys!!

-Patrick

 

[WizardTSi]

I'll second using the wires off the control unit. As the connecting harness for the ECU has different colors and might possibly be a connector for a different version.

 

[blackjdm90]

I'll second using the wires off the control unit. As the connecting harness for the ECU has different colors and might possibly be a connector for a different version.

So you are saying possibly just cut the connector and wire them directly to my ECU harness? It looks like the pins go straight through so I doubt it changes anything. Just the color of the wires but the connections would be the same wires. My main question is right now I am not even getting power to the unit. I have the Red tapped into the Pin 102 (which my 1G ECU Pinout chart from V-faq says is Power supply) and the grounds are hooked into 101 (which says is Ground on my pinout chart). There is also pin 106 which is a ground wire according to this chart also. And Pin 107 says it is a Power Supply also except this one says to MPI control relay)

Am I tapping into the wrong pins (102 and 101)?

Should I maybe try pins 106 and 107? I am getting this information from my Layout Chart from V-FAQ for a 1990 AWD. Most of my wiring is different than 91-94 so it makes it a little harder sometimes.
Thanks guys

Another side note, I just replaced the battery and alternator so all of the power is there. Just not getting any to the AFC. All of the necessary wires are tapped into the ECU and my car starts fine, no check engine light or anything out of the ordinary, Just do not have any power to the AFC. Still trying to figure out this mess! thanks!

 

[blackjdm90]

So I double checked the connections for the grounds and the power and STILL NOTHING! Do I have them tapped in to the correct pins? I have power in to the pin 102 and the 2 grounds on pin 101, has anyone had this same problem? on my VFAQ sheet for the layout has 106 for another ground, and 107 for another power supply? should I tap into these? any help would be great, Thanks!

 

[xezerax]

Are you still using the jumper harness? In the picture its hard to tell but on the afc side there seems to be 10 wires.. hard to tell if there is a wire between the red and brown wire in the picture. If you have an ohmmetter check and make sure you have continuity on each wire (or at least the 12v and grounds) from the end of the jumper up to where the wires meet the afc unit.

 

[blackjdm90]

Are you still using the jumper harness? In the picture its hard to tell but on the afc side there seems to be 10 wires.. hard to tell if there is a wire between the red and brown wire in the picture. If you have an ohmmetter check and make sure you have continuity on each wire (or at least the 12v and grounds) from the end of the jumper up to where the wires meet the afc unit.

I have already done that so I proceeded with using the connector harness that I have and I finally figured out the wiring. It was way different than VFAQ which was not a surprise. It took so long and no one had a wiring diagram for the 1990 AWD Talon and so I am going to post exactly what I did and what pin to use for this setup and that will help fellow dsmers in the future. I will post tomorrow on exactly what I did.