Hey all.
As some of you know I have fitted an AEM FIC in my 7a to deal with my management since i boosted the car.
Main reasons are for timing retard, on board map sensor, OEM MAP / MAF sensor clamping and o2 mapping for closed loop trimming amongs other features. Oh, did i mention data logging and ability to use AEM EMS software to analyse data? Anyway, here is what i have done.
First of all here are links to the 7aFE (Manual Transmission) ECU
http://www.emanageforums.com/forums/attach...mp;d=1206491637
http://www.emanageforums.com/forums/attach...mp;d=1206491691
PS. Please remember that I accept NO responsibility if you blow your car up. If you are unsure, ask or get a professional to do it for you. Please use a multi meter to double check pins as some may vary. As you can see i hav some pins in brackets - this is because they are not always where they are meant to be frommarket to market (or auto tranny etc). You need soldering iron, solder, heat shrink, bullet / butt connectors, insulation tape, PATIENCE, 10mm socket, 14mm socket, ratchet, cable ties and luck. Oh, easier is the passenger seat is out.
Connect all the power and earth wires first...then one sensor wire at a time..starting in between to make sure all ok.
1. Ignition type is MAG type. You only need in and out for MAG harness 1 on the AEM. Put away the HALL wires. This will determine your revs. There is no RPM sensor like the SAFC etc. The pins are E5-5 and E5-18.
2. TPS - E6-10
3. MAP sensor - E6-11 (or E6-2). I would not bother with this if you have fitted an aftermarket 2bar + MAP sensor eg. (3SGTE or GM 3 bar etc). You should really only intercept the stock signal if you want to hide boost from the ECU.
4. The AEM has 3 grounds. 2 power grounds and 1 sensor ground. The sensor ground is E6-16 (or E6-9). The power grounds are E6-26 and E5-13.
5. Power is E7-2
6. Injectors are tricky. The 7a batch fires injectors 1 and 3, and 2 and 4. Ittook me ages to work it out after reading the forums and speaking to SB @ AEM on the phone. They gave me a diagram that works well. I used it and i'll tell you how i did it.
basically, it's similar to bridging an amp. Now the FIC comes with inj 1 through 6 (in and out) so 12 wires in total. Put away inj5 and 6 (in and out). Also don't forget the injector signals ate going AWAY from te stock ECU unlike the MAP sensor and TPS etc. very easy to wire up wrong.
Now what i did was to join 'inj1 out' and 'inj3 out' together and connected to pin E5-12. Then the same for 'inj2 out and 'inj4 out' connected to pin E5-25. The car just refused to start. Seemed like the reasonable to do, but the reason for this is that the FIC could not handle the load from the injectors. To deeat this, I ran 4 wires through the bulk head (firewall) and connected straight to the injectors. I just cut the injectors wires about 3 inches from the pigtail and connected the wires direct. Remember injector 1 is at timing belt side..followed by 2, 3 then 4 at the gearbox side. Now connect these wires to 'inj(1-4)out' accordingly.
You can bridge the input signals as usual ie - pin E5-12 (Stock ECU side) ==> FIC (inj1 in + inj3 in). pin E5-25 (Stock ECU side) ==> FIC (inj2in + inj4in).
PS. I used yellow for 1 and 3 and green for 2 and 4. If you will get confused, then use 4 different colours. I just marked mine.
7. Next o2 sensor signal. This is O21+. If you have a 2 o2 sensors as stock, then cionnect te second one to o22+. Nw here you can either tap your stock signal with a 1k resistor or use the 0-5v signal from a wideband controller. (resistor to be used only with 0-1v narrowband signals). wideband signal is direct. Only wire this if you plan on doing closed loop mapping. If you don't, then don't bother. If ou have a wideband, and only want to use the signal for data logging, then connect to aux in.
8. Datalogging Wire. This is the 'log in' wire. you can set this up by fitting an on/off switch with the other end to ground.
9. Boost hose can be run through the bulk head behind the UK passenger glove compartment.
I'm really sleepy now so can't remember the others. Will edit this tomorrow. Not sure if you want to sticky this for future reference.
Jay.