From hondascoiety
H22 Swap Faq's
Updated 04/15/04
General Swap Info
Use the accord wiring harness and lengthen/modify the harness to fit the H22.
The oil pressure sensor has a different plug on the h22, swap the accord sensor onto the h22.
ECU Wiring For Obd1 ecu's
vtec soleniod: Pin A4
vtec pressure switch: Pin D6
knock sensor: Pin D3
Secondary Intake Soleniod: Pin A17
Use accord axles
Buy a manual for the year prelude your H22 came from, the year of the ecu you have and the car.
ex. 97H22 with p13 obd1 ecu into a 94 accord. Get a 97 prelude helms,
a 93 prelude and a 94 accord helms manual. Goto www.helminc.com to get them
Air Conditioning
To keep ac take the bracket off the F22 and put it on the H22 and use the accord compressor
For 5TH gen Only
Use 92-96 prelude timing belt side mount, keep in mind that you will have to grind it down to fit, and the rest accord mounts
Swap pin A6 with pin A11, the accord is unique from other hondas. those 2 wires control
the o2 sensor heater and egr control soleniod. They are backwards in the accord
The exhaust must be reduced in length and it is reccomended that you get a cat to match the year
header you have. (ex. if you have a 94 h22 header get a 94 prelude cat, etc) the 97+
header is different and the cat isnt the same.
To keep the Powersteering you must have a custom line made using the lower 1/2 of the accord line and upper 1/2 of the prelude line OR use a 97 prelude pump and bracket
For 4TH Gen Only
Use all accord mounts
The exhaust bolts up to 93-96 Prelude header
No pin swaping is required
There are 2 ways to do the powersteering.. either use all the accord stuff, bracket, hose and pump.. or use all prelude stuff. the prelude stuff looks and fits better but if your in a bind the accord stuff will work.. however one of the bolts on the bracket wont line up so only 2 bolts hold the bracket on.
The egr valve has a small rectangle plug rather than the roundish one, the best thing to do is put the accord egr on the h22 intake manifold.
obd2 engine in a obd1 car
ex. 97+ H22a4 into 90-95 accord
You must get an obd1 ecu, obd1 injectors and obd1 distributor.
obd1 engine into obd2 car (5 Spd Only)
ex. 93 H22a into 97 accord
Get your favorite obd2-obd1 conversion harness, skunk2, hondata, etc
Move the crank angle sensor wires from the crankpully/timing belt area to the distributor.
Repin the distributor connector using the obd1 plug that should have come on the engine, put
the 2 wires you just moved into the 2 left over pins on the plug.
Internal/External Coil Issues
If your car came equiped with an internal coil then the jdm h22 distributor will plug right
in no problem. However, if your car had external coil then you will have to modify one plug.
The plug you will need to modify is the plug that went to the stock coil. There are is a yellow
and a yellow/black wire, splice those 2 wire together. The green wire is useless, dont worry
about it
What Cap To Use
For JDM internal coil use 00 civic SI or 90-93 accord ex cap and rotor
For USDM internal coil.... DUHH!!! use 93-95 prelude vtec cap
MSD Install
For External Coil equiped cars
Cut the Plug that went to the stock coil off, splice the yellow and yellow/black
wires together, and you will also need to hookup the small red wire from the MSD
to these 2 wires.
The green wire is the trigger, connect it to the White wire on the MSD box or
the negative side of the coil if you are only adding a coil
For Internal Coil cars
You will need the MSD conversion distributor cap.
Take the coil out of the distributor. Run the 2 wires that orignally connected
to the coil out through the hole in the cap, rember which one is negitive and positive.
Connect the positive to the small red wire and the negitive to the white wire.
ApexI VAFC Settings
These settings are different for each car, use these as a baseline and get your car on a dyno
-2 from 0-4800 wide throttle
-5 from 4300-8000 wide throttle
vtec lowhigh 4700
Vtec highlow 4600
Throttle point low 10 high 50
1/4 Mile times for your Hybrid
It really depends on how well you can drive and the condition of your engine. We have seen
anywhere from mid-low 14's to 16's in accords with H22 swaps.
6TH GEN TECH
There isnt much info on 6TH gen swaps. Aperantly the timing belt side mount is an issue as
well as the immobilizer
Transmision Codes
thanks to V4lu3s
m2a4...jdm prelude tranny non-lsd
m2b4...jdm lsd h22a tranny
m2s4...usdm h23a1 tranny/possibly also JDM f22b tranny as well
m2f4...usdm h22a1 tranny
m2ya...usdm h22a4 tranny
m2u4...usdm type sh tranny
t2t4... jdm accord sirt 5spd lsd
t2w4...accord type r lsd
Auto tranny codes thanks to projekakkord
MP1A...JDM h22 auto tranny w/ lsd
MP0A...JDM h22 auto tranny, non LSD
Another tranny update. The JDM LSD will NOT fit in the USDM tranny case. The jdm case is bigger.
thanks to Gerhard_001 for that piece of info
:Update: I found something for you obd2 automatic guys. There is finally a obd2 auto to obd1 auto conversion harness out there. I cant vouch for these guys, as i have never used any of their products. http://jkobdconversionharness.com/m...ite/Custom.html
more auto swap info courtsey of JWise1203:
To make the shift lock operate properly you will need to run a wire from the shifter position switch to the tranny controler. On the left side of the shifter there is a box with about 5/6 wires going into it. This is the shifter position switch. You need to tap into the GRN/WHT wire and run it back to pin A7 on theTCM. Plug A is the bigger of the 2 plugs.
