legacycentral bbs

I've been working on mapping the stock ECU I/O to the Link. I've setup the I/O and mapped what goes where, etc.

I'm not sure if anyone but Dan has done this before for the Link, but figured I'd see if anyone has any comments.

For those that aren't familar with the Link, extra injection & ignition outputs can be used as auxiliary digital outputs. I've left Ignition 3 & 4 open in the event I would want to go to COP some day. I'm also not sure whether I'll need the narrow band O2 setup or the idle switch, ignition switch, & starter switch but I added them anyway. I'm planning to tie all the grounds together from the stock ECU harness, run a lead to the engine ground spot on the intake manifold along with the Link grounds, and then run a lead to the negative post on the battery. With that, I'll probably just run a lead to the battery for power just to make sure I've got good power.

I'm not really sure what else to add. I could put my AWIC pump in, but it's fine the way it is.

Here's my map for the stock ECU & LinkPlus G3
http://main.experiencetherave.com/subar ... -O_Map.xls

Here's the ECU Pinout for the G3
http://www.linkecu.com/support/dlandswu ... lation/G06

I don't have excel on this computer I just got yet, unfortunately.




I'm not using the Idle switch. Can the Link do anything with it?



I ran several new wires my map sensor, sensor grounds, and a few others. When I get another car for all my stuff I'll seriously tear into my harness to clean it up.



What are you going to do about your fans? The factory setup has them controlled independently. I ran both of mine off of one of the factory relays, but it only liked that for about a year before it went out.



Oh, and if you find the wire from the reed switch (spedometer) let me know. If I stay with a 1st gen I need to find it.

Any way I could see a pic of your g3? I would like to know if any of this is pertinant to my g1 install.

Arctic Assassian wrote:Any way I could see a pic of your g3? I would like to know if any of this is pertinant to my g1 install.

http://bbs.legacycentral.org/viewtopic. ... 716#253716

93forestpearl wrote:I don't have excel on this computer I just got yet, unfortunately.

Have your choice of a pdf or htm

http://main.experiencetherave.com/subar ... -O_Map.pdf
http://main.experiencetherave.com/subar ... -O_Map.htm

93forestpearl wrote:I'm not using the Idle switch. Can the Link do anything with it?

I'm not sure if there's anything specifically it can do with it, or if it even needs it, but since I'm doing the wiring now, and have plenty of inputs, I figured I'd put it in.

Link mentions it here...but doesn't specifically mention a use for it.
http://www.linkecu.com/support/dlandswu ... lation/S01

93forestpearl wrote:I ran several new wires my map sensor, sensor grounds, and a few others. When I get another car for all my stuff I'll seriously tear into my harness to clean it up.

What are you going to do about your fans? The factory setup has them controlled independently. I ran both of mine off of one of the factory relays, but it only liked that for about a year before it went out.

Funny you mention the fans. Friday afternoon I had been staring at the radiator & cooling fan diagrams because my car has been doing something weird where the fans will continue to run even after the a/c has been shut off and the coolant temp is around 181 or so...around where the thermostat is limiting it. Even if I shut off the car, and the key is in the ACC position, the fans still run. Since the ECU shuts itself off in the ACC position, the only thing I can think of is that a relay is sticking.

The main fan relay is on the fuse box. The remaining cooling fan relays are in the engine bay. I need to do some testing now that I've looked at the diagrams.

Anyway, from what I've found from looking at the diagrams is that there is this AC short connector. If you don't have AC, I believe this is supposed to be jumpered together. If you do have AC...that question is still in question. From the diagrams, it appears that if this connector is not connected the fans operate independently...or may not operate properly. I'm not positive about that....but without it....it doesn't make sense.

My car has always operated with both fans coming without the AC. I believe this AC short connector is why. I want to try and find it. I believe I have seen before, but never really knew what it was.

If I find it, and confirm my theory, I'll let ya know...as that would be all you would need to do to get both fans operating together. I guess I'll find out for sure when I get the link all wired up.

93forestpearl wrote:Oh, and if you find the wire from the reed switch (spedometer) let me know. If I stay with a 1st gen I need to find it.

It should be connector B58, pin 11

From the looks of your spreadsheet you have a pretty good handle on the situation.


I didn't know there were separate relays under the hood for the fans. I ended up getting a 20 or 30 amp relay and doing my own beefy wiring for it under hood. After I did that, I cooked the plug right off the fans since I had both fans running off the one connector. Some beefy spade connectors too care of that.


If the next car has AC I'll be keeping it this time so I'll have a different sceme for the wiring aspect.



Since I don't have AC or and evap stuff my wiring is much simpler than yours.

Cool.

Thanks for the comments. I need to work on desoldering one of the n/a ECU plugs to use for my harness, and then layout the two plugs.

I might end up doing that on the next car. We'll see since I'm half tempted to tear most of the harness apart.

If this was a track car then I'd consider doing that, but since it's not, I'm not going to bother.

I think the wiring will be the easy part.....it's removing the intake manifold and tapping it that isn't going to be fun.

I did a little reviewing and will be revising the inputs to digital inputs 9-12 first since they are just basic inputs. 1-8 can do frequency inputs. not sure if or when I'd use them, but since the others are just basic inputs, I'll move things around.

On further inspection DI 9-12 are non-existent and only in the software.

However I did make two changes. I moved the tacho from ignition 8 to aux 3, and also added the self-shut off control (ecu hold power) to allow the ECU to turn off a few seconds after the ignition is off.