h22a accord..
can u please help me with someting..its getting dark..and i gotta hurry, ill tell u more when i got more time..gotta fit in as muchwork as i can.
afew qick questions..
when u say u used the accord wiring harness..did u mean the whole harness..meaning the one that connects to the ECU..and also the one that connects to the ENGINE itself..
-YES, thats what i mean, use the whole accord harness,leave it where it is, you will have to remove those plastic harness covers and run the loom under the inlet manifold. you will HAVE to make sure the harness goes as close to the underside of it ( you will need to undo the inlet/ block support mount. other wise it wont connect up to the h22a sensors ( the sensor wires that are already on the accord loom) and plug into the same sensors on the h22a that were on your old motor. I do not have any plastic covers on my loom anymore becuase it wouldnt reach with them on it.
Okay, every plug on the accord harness will reach (except for IACV and IAT, i had to lengthen these with new wire , i actually got it out of the prelude loom.) should clip where it has to,. Get creative and make it fit. I didnt even have to lengthen the alternator wires, i just cut off the factory loom wrap so the loom had enough slack to reach the plugs, i even tucked in the alt wires into the cover that fits on top of the tappet cover.( see picture below.)
or did u use only the part that connected to the ECU..but kepts the h22 one that came out of the engine..
like i said, i used the accord harness, i didnt remove it from the car at all. The accord harness plugged straight into the prelude ecu.
beacuse looking at ur iring diagrams...it seems the wires are different on my harness...
yes the wire colours are different on the prelude wiring digrams, I discovered that too, this is becuase its a prelude wiring diagram, not an accord wiring digram , some wires are the same but some are different and it makes it seem alot more complex than it really is. , that is one of the main reasons why i couldnt hook up the egr and fast idle sensors to the ecu proberly ( obviously, cos when we tried we ****ed it up so we just left them off)
all you need to concentrate on is getting the wiring from the IAB, the knock sensor and the o2 sensor the the correct locations on the ecu. I pulled the H22a harness to bits and got the wiring and plugs (with plugs still intact to the wires) for the IAB, IAB positive, knock, EGR and fast idle thermo valve, and in your case, vtec pressure, vtec selonoid and vtec ground, ** any grounding required ( vtec ground )for these sensors can be carried out by screwing them into the floor pan near the ecu and find a 12v constant on the wiring loom at the ecu and attach the IAB positive to that. just splice it in. ** read above post and you will see what the colours are etc. Now, get all this wiring for these sensors, and make it into a loom, make sure that all the wires are long enogh to reach the sensors and you need them to plug into of the h22a and that it will also reach back through the grommet in the passenger side of the fire wall to the ecu. remember the earlier pic of the new loom i made? well, it should look like something like that. this loom is only for the sensors on the h22a that have not been connected, these are the onlt sensors you have to worry about.
i knoe it is an auto harness..but i think we have established which is for te auto transmission control..etc..
okay, if you have established what ones are for the auto harness, thats cool. do what you have to do for that, i honestly dont know whats required in swapping it from auto to manual as i was doin a manual to manual conversion. Im fairly sure though, your accord harness should plug straight into the prelude computer.
the pins all seem different..should i be using the orignal accord harnes? even the one that comes out of the engine..
or do i mix and match..
you are reading into things too much, you are probably getting caught up in the fact that certain wires in the ecu pins are different colours to the ones in the diagram. just find the correct locations for the sensors that need connecting, pull the h22a loom apart and find the wires needed. For example, pink for IAB, you run that wire, ( in your new loom that you have made from the IAB down to pin A17 , its the 5th one from the left at the top if your looking at the plug 'A' on the chart i posted earlier.
so, basically, all you are doing for the wiring on this conversion, is using the complete Accord harness but then you make a seperate harness consisting of the wiring needed for the sensors that are on the h22a that are not on the old motor. you connect all the wires on this loom to all the sensors except the egr and fast idle thermo valve ones.
the accord harness has the capablities to put these new wires into it, so when you plug in your ecu harness plugs with the new wiring added, the sensors will now be connected.
if you look in your prelude harness ecu plugs, you will see the correct coloured wires in the correct locations for the sensors you are adding. All you need to do is take out those tiny little ecu plug pins, and put them into the accord harness plug in the same location as they came out of the prelude plug.
I know this is the hardest part of the conversion, it all seems very confusing until you have it sorted, it took us about 10 hours from pulling the prelude harness to bits, getting the correct sensors and wires and making up a new seperate harness with them and then connecting it up to the required sensors and back to the right pins on the ecu.
And please, dont rush it, take your time okay, you only have to do this once, once you have done it correctly , that is it, its finished okay. So, take your time, sleep on it if u wish, or just stop pulling your hair out getting frustrated etc and leave it for a couple of days , sometimes things seem so much clearer after that. If u rush, you might stuff it up and all that means is even more work!!!!
heres that pic of the motor, you can see where the alternator wiring goes under the plastic cover that clips in to the tappet cover on the passenger side of the motor.
mate, stick at it, you will get there. i have told you as much as i know, if you dont understand any part of it, let me know and i will do my best to help you.
cheers, cam.
p.s you owe me a few bourbons ok. :P
http://img73.photobucket.com/albums/.../dashizzle.jpg
