But what about those who never did a 2jzgte harness for a swap before and really have no idea which plugs to get from the original harness ? I suggest you use the process of elimination
Get your updated Chart . By now you know that you have worked on every plug that is on your Aristo 2jzgte harness.
You will use the 80 pin Connector on your Chart . We know that from the SC300 harness we need the 40 pin connector and all those body plugs / connectors you see in the picture except the 80 pin connector . Though if a pin from the 80 pin connector has a wire that connects to the other plugs , we have to make sure that is done on our 2jzgte harness too. So , we start removing unnecessary wires from SC300 80 pin connector.
Start with the first line of your Chart , Pin 1... check your SC300 80 pin connector . .. does it have a pin and wire on that slot ? In this case , no , so you have nothing to do. .. proceed to the next line in your chart.
It shows pin 3.......check your SC300 80 pin connector ... does it have a pin and wire on that slot ? In this cas , yes , so take out the pin , pull the wire up to 6 inches before the plug then cut it. You want to keep the plug with a pigtail so you can reuse it in the future... proceed to the next line in your chart.
It shows pin 5 ..... check your SC300 80 pin connector ... does it have a pin and wire on that slot ? In this case, yes ,so take out the pin , pull the wire up to 6 inches before the plug then cut it. .. proceed to the next line in your chart.
It shows pin 6 ......check your SC300 80 pin connector ... does it have a pin and wire on that slot ? In this case, yes ,so take out the pin , pull the wire up to 6 inches before the plug then cut it. ... proceed to the next line in your chart.
What you are trying to do is remove all those wires on your SC300 harness that you don't need on your 2jzgte harness because you already have them. Once you are done with all those pins on the 80 pin connector , what should be left behind on the SC300 harness would be wires / plugs that we don't need on the Aristo 2jzgte harness and a bit more that where not removed by the process we just did. I will show you how to remove them next.
TAKE NOTE :
a) IF you are taking out a pin from the SC300 80 pin connector and it's wire has connectivity to any of the body plugs or to the 40 pin connector . don't take it out for now. We will do them last. You want to make sure that connectivity is transfered to your Aristo 2jzgte 80 pin connector.
B) When you pull out a pin / wire from the SC300 80 pin connector , if there are wires T'ed or branching out from it , take those wires out too and cut them also 6 inches near their plug.
I normally don't do what I asked you to do above since I know what plugs/wires I have to get from the SC300 .... but for the sake of this tutorial , I decided to do it so to show you what we end up with if you do it . This is what I came up with . I have less wires now on the SC300 80 pin harness.
So what are those left over wires from the SC300 80 pin connector ?
a) around 6 of those wires have direct connectivity to the body plugs or 40 pin ECU connector that is why I didn't remove them yet.
b) some of them are basically just for the SC300 like wires for MAF which the Aristo 2jzgte didn't have. .. .....we will find out next
You see when I told you to take out a pin , take out the wire and cut it 6 inches before the plug , some of those plugs didn't have their other wire end or go back to the SC300 80 pin connector so the connectors are still there.... just like pictured ...
Now time to do the reverse to further to investigate those wires still there on the SC300 80 pin connector
a) from the plugs trace their wires , if they end up at the SC300 80 pin connector , take out their pin and wire ....
or simply get the 2jzge 80 pin configration chart and see what are those pins and if you don't need , take them out with their wirings
It may sound to be a ridiculuous process but will help you determine what you need from your current SC300 harness if you don't have the slightest idea of which plug / wire you need from your SC300 harness.
Like on my end , I don't have to do that pin by pin removal ...II can just cut those wires since I know where to connect them or if I do the process of elimination , I can do a bunch at once and would start from the plugs , pulling the wires towards the 80 pin connector since I know which plugs are not needed and will end at the 80 pin connector. The tedious process above is for those who do not have the slightest idea of what plug / wires you need to keep and merge with the Aristo 2jzgte harness.