First, lets acknowledge that there are lots of other posts and threads on how to upgrade to a 1G MAS. If you are considering doing this modification, you'll want to read through the 1G Turbo MAS conversion thread located in Fuel/ECU System FAQ located here: http://www.starquest...topic=28110&hl= If you read through that thread you'll see in Post #19 zactek mentions swapping the pins on the SQC harness with the pins on your 1G harness, but doesn't really get into specifics ... that's what this is going to cover.
To begin with, you are going to need a 1G MAS obviously, and 1G wiring connector. The beauty about doing it this way is the connector doesn't have to be a turbocharged car b/c we're removing the pins anyway. This opens up your junkyard searching to just about any early Mitsu vehicle that had a 8 pin MAS connector.
1G MAS (MUST be from a turbo-charged model)
Wiring connector harness;
You're really only going to need one tool to do this - a dental pick. It took me several hours and multiple evenings to figure out how to do this and what tool was best, so, hopefully this will save you all some time.
Here's where it's going to get hard to "show" you want to do. You'll have to just try this out yourself and get the feel for it. There is a slot in the middle of the connector. Each metal connecting pin is held in place by a very small plastic clip, or finger. You need to get the dental pick between the pin and clip, pry slightly up and pull the pin out by the wire at the same time. It's not easiest thing to do, but once you figure it out and do a few you'll get a knack for it. If you look down in the slot with a decent flashlight you might be able to see the little clip/finger thing I'm describing.
Because we're not interested in the wires in this case, you just remove them from the connector and discard them. Continue one by one until all the wires/pin are removed you have just the connector in your hand.
Now, on the SQC side of things, we do have pay attention to wiring. For this, I'm going to use the same numbering system as the thread mentioned above to keep things consistent. However, in that thread the numbers are provided looking at the back of the connector where the wires enter. I never really look at connectors that way, I'm usually holding them in my hand looking at them from the front, so I made my own diagram to help keep things straight. Below is the connector on your Starquest looking at it face-foward with the associated wire colors. Below that is the 1G connector. We're going to connect 1 to 1, 2 to 2, and so on. Basically, the unused pin and 7 aren't used at all, so the right two slots will be empty.
Now, it's time to repeat the process, except in the engine bay of your car. Hopefully you've had good practice removing them from the loose connector on your workbench b/c working in the engine bay is a little more challenging.
Here's my first pin removed. Top right White/Black
A few more removed:
All of them removed:
You may want to plug each one in right away as you remove them, I didn''t b/c I had my pinout sketch to look at to make sure I had everything right. In the picture above I thought I had them all separated correctly in order, turns out I had the Red and White/black flipped on the left side there. I caught it before I installed them.
To install them all you have to do is carefully slide them back into the 1G connector, you'll feel a little "click" and that's it, they're locked in place. No hacking, soldering, shrink wrap or anything. Just a dental pick and a steady hand.
Here are the wires re-installed into the 1G connector.
Edited by techboy, 06 July 2017 - 11:56 PM.