How to connect pins on my ECU ?
- Thread starter Em1blue
- Start date
A4 = VTEC solenoid
D6 = VTEC pressure switch
These do not get wired together, they go from the ECU into the engine bay and connect to your .... VTEC sol and VTEC pres switch!
You had written down the digits backwards. Be careful of what you're doing or you'll need more $$$ to complete your project.
D6 = VTEC pressure switch
These do not get wired together, they go from the ECU into the engine bay and connect to your .... VTEC sol and VTEC pres switch!
You had written down the digits backwards. Be careful of what you're doing or you'll need more $$$ to complete your project.
You dont bridge pins for this. As said, you must wire the specific wires directly to what they go to inside your engine bay unless your car harness already has plugs connected to these items. In that case, youd plug your wires (youve made) into the correct harness spots. Do you have plugs hooked up to your vtec sol and pres switch? If yes, you run your p28 pins to where those wires end. If you dont have connectors attached (like a vtec head swap), just wire from p28 to where the connectors would go.
Well put Alaska!
So your jumper harness isn't correct then? That sounds strange to me. The point of the jumper is for it to be 100% set up for the ECU it's jumping to. Other wise people wouldn't buy the dang things. If that's the case though, you'll have to pull the wires out of the spots they're in and move them to their correct P28 locations. Don't add more wires to jump from one spot to another creating 2 of the same thing. That has disaster written all over it.
.. something doesn't add up here. Maybe we're not getting the full story or i'm just not smelling what you're cooking.
Post a pic of what you're working with. Maybe that will clear things up.
.. something doesn't add up here. Maybe we're not getting the full story or i'm just not smelling what you're cooking.
Post a pic of what you're working with. Maybe that will clear things up.
That doesn't make any sense to me. Who told you this? First, a stock p28 will make a B16 run like poop. Could this be the reason you think you don't have vtec? If you haven't already, you're going to need that thing chipped with a p30 base map to at least make you run like a p2t would do. And why aren't you running a p2t anyway? Most people that go ob1 do so because they need advanced tuning from going with a boost set up and Hondata. If you think you're gaining anything from sticking a stock p28 in there, you've heard some bad information. Also, not all p28's are the same. Be sure you're not running an Automatic ECU (I assume you're manual) but if you are, it can be modified easily. Though I'm not sure if an auto would even run in a manual car or what'd it do? Never tried I guess. If it does at least let your car start and move, that could also be the cause of your problems. Do a quick check if you aren't sure which you have.
Here is a quick cheat sheet of auto/manual p28 codes:
92-5 ECUs P28-..... (pick from the list below)
5spd = 000, 001, 002, 003, A00, A01, A02, C00, C01, C02, J00, J01, J02
Auto = J50, J51, 901, 902, C50, C51, C52, A50, A51, A52
As I mentioned before, your jumper harness should take care of moving your OBD2 VTEC pins to the correct location of VTEC on OBD1. That's the point of the jumper harness. They're supposed to be plug and play. If you have one that someone messed up, well that's a different story. There is no pins on a p28 that can jumper vtec pins across each other. It doesn't work that way. If you really believe your vtec isn't working, try running a jumper wire DIRECTLY to your vtec solenoid and pressure switch. That will solve your question once and for all. The pins to run from were posted at the top of this thread. DO NOT MIX THEM UP.
And again, if you're running a stock p28, that's going to be a problem. Fix that first before you go jumping wires and making things more difficult.
Here is a quick cheat sheet of auto/manual p28 codes:
92-5 ECUs P28-..... (pick from the list below)
5spd = 000, 001, 002, 003, A00, A01, A02, C00, C01, C02, J00, J01, J02
Auto = J50, J51, 901, 902, C50, C51, C52, A50, A51, A52
As I mentioned before, your jumper harness should take care of moving your OBD2 VTEC pins to the correct location of VTEC on OBD1. That's the point of the jumper harness. They're supposed to be plug and play. If you have one that someone messed up, well that's a different story. There is no pins on a p28 that can jumper vtec pins across each other. It doesn't work that way. If you really believe your vtec isn't working, try running a jumper wire DIRECTLY to your vtec solenoid and pressure switch. That will solve your question once and for all. The pins to run from were posted at the top of this thread. DO NOT MIX THEM UP.
And again, if you're running a stock p28, that's going to be a problem. Fix that first before you go jumping wires and making things more difficult.
Ok, since you have a chipped p28, you should be set there. I still don't understand why your jumper harness isn't plug and play but oh well I guess. What you can do is verify what exists from your OBD2 plug and what it goes to in your jumper. I already gave you the pins you need on the p28, here is what a P2T pin out looks like. Keep in mind what direction you're looking at your plugs when you start doing wiring and be sure of the color codes.
B12 and C10
B12 and C10
Hmmm... Well if your chipped P28 VTEC wires get routed correctly through the jumper harness and to their correct location at the engine, you should have VTEC. Where did you get this ECU from? Maybe the tune isn't correct. When you burn the chip, depending on the program you use, you can set the VTEC values and when it should engage. You can also load in other maps that aren't even VTEC.. Do you have a buddy with another ECU or a chip reader who can verify it's correct? I use a Moats burner myself. Works awesome.
Again, you may want to try routing two wires direct off your ECU straight to the engine and see if that works. Then you'll know 100% if it's bad wiring or a bad ECU. I'm sounding like a broken record here. Not sure what else to tell you. Good luck man.
EDIT: You said you put this P28 in to clear CEL's? What codes did you have?
Again, you may want to try routing two wires direct off your ECU straight to the engine and see if that works. Then you'll know 100% if it's bad wiring or a bad ECU. I'm sounding like a broken record here. Not sure what else to tell you. Good luck man.
EDIT: You said you put this P28 in to clear CEL's? What codes did you have?
Em1blue
New Member
Found out the ECU was bad. It wasn't even a p28. P06 converted. Had a h22 base map wrong resisters. Shitty soldering job. Cost me $70 to get it fixed. Still not feeling or hearing vtec. Pulls good at Vtec tho. I put a muffler on a few weeks ago and noticed it more. I have to open it back up I think. Idk