Mystery ECU (SR)

[Hijacker]

I posted this new little toy over in the SR forums, but since my research hasn't produced anything, I thought I'd try to get a bit more coverage over in the 240 gen area.

This ECU fell in my lap for experimentation. It's been run on a car with no grenading of said car's engine. It's an adjustable ECU. Looks like a reflashed ECU, but it's had an adjustable toggle switch wired into it. 3 Settings. 1 is probably stock, 2 is probably a better map, and I guess 3 is gonna be the best map it can work with.

The badging is kind of faded, but it looks like it says "succes CRIENTWORKS" right under a big logo that says "selection". It also has a very long wire cluster coming out of it so you can mount the togle switch in one of the dash panels that contains the O/D light, etc. The only thing that I can't figure out is why it has an additional 3 wires coming off the selector switch (red, blue, black) Black should be ground, red should be 12v, but blue? Also I don't know why it has those since the ECU should already be covering grounding and voltage. The only answer I can come up with is that the daughter board needs grounded and supplied. But my friend who owns the ECU didn't wire any of the tail harness wires and the ECU ran fine.

Anyways, on to the pictures!!

The ECU itself

The label. kind of hard to read in this shot.

The whole thing

The tail harness coming off the switch. note the blue, red, and black wires.

This is the plug wire the main harness and tail harness converge to go to the switch. The red wire doesn't go to the switch, it instead goes straight through the plug through both harnesses.

The blue wire goes from the tail harness to the switch, and then it loops to another plug point.

the switch

Again.







If anybody knows anything about this ECU. Wiring, knowledge of the company, etc, please let me know. It will be a huge help. Right now, I'm just trying to figure out where I'm gonna wire the tail harness in for testing. I'm guessing it's for alternating current, or switchable current (too early in the morning for me to be coherent).

[Hijacker]

bizzump?

[Cyberkreig]

The switch, i would be more than willing to guess, selects different maps or levels or performance.

[Hijacker]

duh. i'm trying to figure out where to hook the blue wire up to. i'm gonna bite the bullet and tap it into the ignition voltage from the radio

[Cyberkreig]

I'd be careful of that. it will only take one mistake to fry the ecu & board.

You should hookup the ecu and go at those leads with a volt meter

[Dattebayo]

Well, in wiring some Direct Current applications, blue has been known as a ground wire when black or another color may be confusing to another application.

I'll clarify. Sometimes a filter is used on the ground to eliminate distortion by AM waves or whatever, its called a Isolated Ground circuit. They usually use blue wire to the filter, than black to the (-) side battery or body ground.Just an example to say that maybe the blue goes into the ground block at the fuse location or something like that...