Im just gonna stick this stuff here. Pretty much all that I used to fire the engine up.
This diagram helps to understand the working principle of the ECU. Note however that the fuel pump relay is not in the diagram, but it still exists. (im referring to Circuit Opening Relay)
IGSW - Receives a signal once the key is turned in the barrel.
BATT - is constant power to the ECU
MREL - Once ECU gets the IGSW signal, it uses MREL to close the main relay. Which in turn provides +B to the ECU.
+B - Switched ECU power.
Igniter and Coils also need power. My car had a wire that supplied power specifically to coilpacks once the key is turned.
If you havent seen the triplecrowndrift.com write up on 1jz vvti wiring, I suggest you google it since it has some useful info, but I will put the pics he made below.
ECU Pinout. Specific to 1JZGTE VVTI from a JZX100. Dont use it for anything other than this engine. All JZ ECU's are slightly different.
To start the engine, you need only the following:
IGSW - Switched Ingition power
BATT - Constant Batt Power
+B - Power supply through the main relay after its been switched by MREL
Then these ones to drive
STP - Stop signal, not sure exactly what it does. Maybe deceleration map.
SPD - Speed signal from gearbox or speedo cluster. All depends on you car. But the ecu needs this signal for the engine to work properly.
MREL - Switches main relay after IGSW signal is obtained by the ECU.
FC - Used to switch the fuel pump relay. If i remember correctly, this pin is grounded through the ECU.
Once again, above to start, and these to drive.
W - Check Engine Light
FPU - Fuel Pressure up. Solenoid under the intake manifold
TE1 - Diagnostics terminal
These next two pins are incorrectly marked on the pinout. They should be shifted one space to the right.
ABV - Turbo blow off ( Re-circulation) Vacuum switch
PRG - Fuel vapour vacuum switch.
You dont need anything else other than mentioned above connected to the ECU.
Then you have your engine body plugs. In these you have:
Power to sensors
Power to coilpacks
Power to injectors
#3 The pinout is slightly wrong on the connector below. Use continuity test to get correct pinouts
Ill try update the above with more info. Cant remember much more off the top of my head at the moment.
Altezza specific ECU to JZ ECU wiring