test connector search...

[zstalker]

First off, let me say that yes, I've searched the whole board, stem to stern.

I'm getting an SPFI harness ready for installation on my EA81. I've made lots of good progress, but I'm hitting a snag with all the "test" settings, connectors, etc. ok, lemme see if I've got this right. PLEASE correct me if I'm wrong, I really would like to have a functioning ECM when I'm done...sorry for my very detailed explainations, I really want to make sure I'm getting the right things together.

D-Check: brown wire from pin 31 goes to a green 2-slot connector, only the one prong is used. This connector has a matching green mate with one black/red ground wire that, when connected to eachother (normally disconnected from anything), activate Dealer-Check mode...run the engine up for a little bit for a self-diagnosis and observe the codes that develop.

Clear memory connectors: Pin 39 is a light-green/white wire going to a white single-prong connector, and has a matching white single-prong connector with a black/red wire. Normally disconnected from anything, connect to eachother and run for a bit to erase all codes from memory.

 

that's all I know for sure, and again, please correct me if any of that was wrong.

 

Coming from ECM pin 37 is a green/red wire that goes to a white, 2-prong connector along with black/red ground wires on the other prong. This is labelled "test mode connector", but has no associated mate to connect to. what is this for, and what does it plug into?

 

for that matter, these also I have no explaination for:

pin 3, red wire labelled "test 4"

pin 10, yellow wire labelled "line end cord output"

pin 11, blue wire labelled "line end cord output"

pin 12, red/blue wire labelled "line end cord output"

these 4 wires (along with a switched power wire and a ground wire) all go to a yellow-ish (faded from white?) connector, also with no mate.

 

in all my searching I hear many references to a "read memory" connector, but I don't have any idea what connector that is, and what it connects to.

 

sorry for all these questions at once, but this is kinda where I'm stuck now. I've got the motor rebuilt and ready to drop in the car, so I'm basically just needing to get the harness ready and fire it up...

GeneralDisorder, Gloyale, nipper...any others...I'm eager to soak up your wisdom.

 

~Erik~

 

BTW, I made up this color chart for the ECM pin layout...a gift for the board. It has already helped me immensly.

[subynut]

Clear memory connectors: Pin 39 is a light-green/white wire going to a white single-prong connector, and has a matching white single-prong connector with a black/red wire. Normally disconnected from anything, connect to eachother and run for a bit to erase all codes from memory.

Ok, the clear memory connectors are accually the read memory connectors. To clear the memory, you connect both the D-check and read memory connectors.

 

Coming from ECM pin 37 is a green/red wire that goes to a white, 2-prong connector along with black/red ground wires on the other prong. This is labelled "test mode connector", but has no associated mate to connect to. what is this for, and what does it plug into?

 

I don't remember seeing that connector on the harness out of the 88 I swiped, but I dont think you will need that one. Was that harness out of an automatic? Could be somthing to talk to the tranny. Not real sure, though.

 

for that matter, these also I have no explaination for:

pin 3, red wire labelled "test 4"

pin 10, yellow wire labelled "line end cord output"

pin 11, blue wire labelled "line end cord output"

pin 12, red/blue wire labelled "line end cord output"

these 4 wires (along with a switched power wire and a ground wire) all go to a yellow-ish (faded from white?) connector, also with no mate.

 

That 6 prong connector is for the Dealer only - some sort of diag tool they can use. You can ignore that connector, also.

 

 

Hope this helps.

Ted

[Gloyale]

 

Coming from ECM pin 37 is a green/red wire that goes to a white, 2-prong connector along with black/red ground wires on the other prong. This is labelled "test mode connector", but has no associated mate to connect to. what is this for, and what does it plug into?

 

This is shown on the the schematics, as a *check connector* It is not shown plugging into anything, nor is there a description about what it's for. I think it can be ignored, either left inplace(then you've got if if ever it's needed) or simply cut it out as it is not connected to anything and isn't a part of any user testing that can be done.

[GeneralDisorder]

3, 10, 11, 12, and 37 are dealer check pins that connect to the diag tool - they allow the dealer to check and clear codes without opening up the kick panel to see the ECU.

 

When I do harnesses, I leave the diagnostic plugs in place and don't touch those wires. Done this way they *could* still be used if you wanted a dealer to take a look at it. I have also removed them for some, but it really doesn't help matters.

 

GD

[zstalker]

first off, thank you all so much...I've gotten exactly the explaiation I needed for those wires. I'm going to leave all the test dealer connecters in place, no sence in removing something that could be useful. I'll have to dig around in the back room to see if we've got the old connector and a computer that can read the codes (I work at a Subaru dealership).

~Erik~

[GeneralDisorder]

first off, thank you all so much...I've gotten exactly the explaiation I needed for those wires. I'm going to leave all the test dealer connecters in place, no sence in removing something that could be useful. I'll have to dig around in the back room to see if we've got the old connector and a computer that can read the codes (I work at a Subaru dealership).

~Erik~

 

That would be neat - I would also be very interested if your access to documentation could possibly provide any sort of schematics of the dealer check plugs - something that might be used, or that might give a hint of how to use, the plug. I have several resources at my disposal for electronics design and fabrication. It would be neat to replicate the "tool" if for no other reason than to say I did.... The SPFI is a simple system and maybe it wouldn't be too difficult. Removing the kick panel is a pain, and it would also allow locating the ECU in a more inaccesible area where the LED can't be seen (although I'm sure that I could wire up a remote LED too - but I bet one of those pins already provides that function).

 

GD