Welcome to the 2jz mk3 club....:biglaugh:
Nice job! Is that an ACT Single disc clutch?
As about wiring the 2jz aristo and your diagnosis issue:
You should only take the pin 6 on the E10 (TCCS ecu plug) and connect
it to the (MA70) M1 (89-92 dark grey plug) pin 9 ...
or to M1 (87-88 yellow plug) pin 8. I think it is the GR-G (grey-green) wire.
Now you will have a diagnosis system for the 2jz motor and the check
engine light will be functioning.
There are some other systems that the 2jz engine (aristo / mk4 supra)
use and are connected to the diagnosis system.These system are not
used with the mk3 supra. And we are going to lose them anyway....
But nothing to lose actualy....:sarcasm:
Systems like...Traction control ecu,Sub-throttle ecu,Fuel pump ecu,Auto-
trans ecu (you go R154...like I did :biglaugh
,ABS ECU (Aristo ABS.we keep our mk3 ABS ecu and system...so no problem here either),and other stuff
that are useless to our car/swap!
So..all the other engine systems will be ok with the diagnosis system that
come from the E9 (TCCS ECU) plug!
Hope I helped!