obd1 gsr into 94 cx hatch

[Theycall_Metue]

cant find anything about which wire is needed to be wired and extended into the ecu.
going to be hard to swap wires once the motor in the car.

IAB has
Yellow with blue strip
Orange and blue strip
they are somewhat hard to tell, color is faded looking

EVAP has
red
yellow or tan.

[NoWAyItZTOMmY]

A17 IAB
A20 Evap

[Theycall_Metue]

yes i know that.
the plug has 2 wires each. one leads to the ecu, i want to find out which one does. the IAB will be too much of a pain to switch wires if i wire the wrong one to the ecu.
you know how the obd1 gsr IM is.

[NoWAyItZTOMmY]

iab - pink
evap -red

you dont have pink for iab, but ill check on it. but one is goes to the ecu, and the other is ground/.

[Cynical 1]

you will have to cut the wire for the evap solenoid, and tap in your IAB wire there. you also need to add VTEC and knock wiring to the car harness, as well as add the pins for them to the ecu harness and ecu.

http://i859.photobucket.com/albums/ab152/yebabee/obd1pin.jpg?t=1292622012

http://img132.imageshack.us/img132/6164/obd1ecupinoutni3.jpg


not that hard to do, but you need to snag some pins from another car to use to plug into the ecu, as well as the engine harness when you add the wiring to the body harness. you also need to wire it for the 4-wire O2 sensor...

if you're using a chipped P28, you don't need to wire for the knock or the IAB's. but i know you're using the stock P72 - so all needs to be wired or you get a happy CEL...

[Scotsman]

Eric , you are too f'n handy at Google ,lol

[Cynical 1]

Eric , you are too f'n handy at Google ,lol

i have all the links saved - go right to them... lol

the link i wanted to use is dead. it had step-by-step pics of the entire process... i guess i'll have to write a guide someday and host it myself.

[Scotsman]

i have all the links saved - go right to them... lol

the link i wanted to use is dead. it had step-by-step pics of the entire process... i guess i'll have to write a guide someday and host it myself.sucks being smart , doesnt it? ,lol

[YoItsCarlie]

I have step by step post up of wiring IAb and vtec. can copy and paste here shortly.

[YoItsCarlie]

This is something that I see come up, and sometimes people get confused by the written instructions, so here's one with pics. This can also be used for wiring just about anything you need, like a knock sensor, IABs, o2 sensor
, whatever. I HIGHLY suggest have a manual with a wiring diagram
and the pinouts, for your ECU, you don't want to screw up now that your motors in right?

Ok, assuming you have a vtec motor in a non vtec car and you need to wire in vtec y0! here it is...

Our demonstrator model is a 95 CX with a OBD I B16A. So you have your motor in the car, and you are using XXXX engine harness, as long as you have the plugs (usually come with motors harness, even JDM, just remove the whole thing from sensor/solenoid, to canon plug from the harness)) you're good. First you need to run the wires...

BLU/BLK and GRN/YEL from here...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec1.jpg

To the canon plugs (shock tower connectors)...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec2.jpg

Now, if you are using the vtec harness there's no need to remove them as there should be nothing plugged into the connector on the other side (on a vtec car, such as a VX, or 92-93, this part is over, as it will have them already) the wires should match up to empty slots. But if there is something on the other side, simply remove them (vtec wires) to an empty slot with nothing on the otherside. For the cabin side of the canon plug, you need to get the pin from the canon plug, to the ECU (junkyard). you need to get enough pins from a junker to connect whatever you are connecting.

Anyway now you have the wires going from the vtec solenoid, to the canon plug and out the other side (note, I have both YEL/BLK, be smart and use different colors so you don't have to guess which is which at the ECU)...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec3.jpg

Now, make sure the wire coming out of the cabin side of the canon plugs is long enough to go through the firewall, and to the ECU.

For the ECU connections same as the canon plugs, you need to acquire the pins. You can pull these out of a junker also. All the pins from the same generation are the same (there are two different sizes in each plug, you'll be using the smaller ones), and I was told that they are all the same from any model, and probably all generations, but I won't swear to it.

Here's how to remove the pins from the ECU...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec4.jpg

If you want to take the time, you can pull the wire al the way from the ECU plug, to the canon plug, but I just splice a couple together, it saves a lot of time.

Here is what you should have...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec5.jpg

The ECU slots on the non vtec models should have nothing in place, just a hole. At this point you should know where the pins go BLU/BLK (in the engine harness, maybe different if you used a different color wire) to D6, GRN/YEL (same as the other) to A4, so what are you waiting for, plug them in already...



Any time you need to splice wires together, I suggest soldering them when done, if you can't, at least use a good male/female plug, I like these... (soldering your wires...no, really, do it)

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec6.jpg

Now, you should have vtec y0!, drive around let your car warm up and then let it rip (provided you aren't still throwing a CEL code). If everything is kosher, bolt in your ECU, wrap everything up, and blend it into your harness for that nice clean look.

You can also by pass the canon plug, and run a hardwire all the way from sensor to ECU, this works to, but doesn't look as clean.

Here is some more wiring pics, to give you some ideas. In the first one, I am using a VX harness (5 wire o2) on a B16A (four wire o2) in a CX (1 wire o2) so I had some issues . Anyway, after figuring out what wires were what, I used my handy connectors and connected...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec7.jpg

For the switched 12V, I used the plug full of YEL/BLKs on the driver side, that goes to the main relay (thanks Poison), and spliced into one of the wires, then ran it to the o2 taping it into the harness once it was all connected, running right...

http://i49.photobucket.com/albums/f298/xero_xero/Honda%20Wiring/vtec8.jpg

If anyone found a mistake, or has something to add feel free. I hope this can help someone that like me isn't real confident in their wiring abilities. All in all you are only limited by how much work you want to do. You can go for a quick get it going job, or undo your whole harness and rebuild it better than OEM.

A funny antidote that happened during this, so, my car even though it was a CX had a VX motor in it, so it was wired for vtec, sort of. Anyway there was no vtec kicking in, and I was throwing CEL 21, so I looked, and realized the guy that had swapped in the VX motor, had mix up the vtec wires, so I unplugged the canon plug and made sure what was where, and undid the wires, and switch the two of them right. Well, I get in the car and go to start it, and it's cranking, but nothing, like it has no fuel. So I was like "****" pull the codes. I get 6, 15, 21, 41, so I am thinking that switching the wires really screwed something up, so I go and re wire them like they were, and am looking at it, and then realize, duh, I didn't plug the canon plug back in :P , So I plug it in and get no codes, I was right, they were backwards, so I went for a cruise to make sure all CELs were gone, hammered it, and all is good.


you can find this verrry same post on other sites which i will not cross link to.

[Theycall_Metue]

yall telling me things i already know lol. i know how to wire vtec and pin in ecu. im trying to figure out which wire goes to the ecu from the iab and evap. there are 2 wires for each and one is ground and the other goes to ecu.

[Cynical 1]

Engine Side - Wire Color Pin - Connection (ecu)

VTEC Solenoid - Yellow/Green - A4
VTEC Oil Pressure Sensor - Blue (passenger side harness) - D6
VTEC Ground - Black - chassis ground
Knock Sensor - Red/Blue - D3
Evap Purge Power - Yellow/Black - 12V power (hot in ON or START)
Evap Purge Solenoid - Red - A20
Secondary Intake Solenoid - Pink/Blue - A17

[Cynical 1]

http://hybrid.honda-perf.org/tech/wiring/wiring01.gif
http://hybrid.honda-perf.org/tech/wiring/wiring02.gif

[Cynical 1]

http://i27.photobucket.com/albums/c183/9000_red/MYVTECGIF.jpg

[Cynical 1]

i can post up about 100x more pics and diagrams... this is a plug and play swap - don't overthink it... lol

[YoItsCarlie]

i can post up about 100x more pics and diagrams... this is a plug and play swap - don't overthink it... lol

i am glad to see someone that collects all these diagrams....

it is by far plug and play. if you run a p28. tie IAB into the Vtec power for the best performance. if using an OEM gsr ecu pin for IAB and Evap...