Pictures attached above note thanks

No, at least not obviously but will give it another go later today

This is the one currently on the car... Found a photo from when I first tried changing them. Uploading while I look at the other ideas thanks

Thanks everyone I will get photos etc and check for everything mentioned later today.

the 1MZ FE pinout is a bit of a minefield because there are multiple ECU variants depending on year, market and whether it is VVT i, immobiliser, cable throttle versus ETCS i, etc. So the SAFC NEO manual often shows one Toyota ECU plug layout, but your Alphard ECU can be a different connector set even though the engine code is the same. Besst next step is to identify the ECU properly first. On the ECU case there will be a Toyota part number (starts 89661 or similar) and usually a Denso number. If you post those numbers and a clear photo of the ECU plugs and wire colours going into them, someone can usually match the correct EWD pinout. If you are wiring an SAFC,, the common signals you are hunting are typically MAF signal, throttle position, engine rpm, injector or ignition trigger, power and ground. The safe way to confirm them is with the Toyota wiring diagram for your exact ECU number, then verify with a multimeter or scope at the pin (for example MAF will be around 0.8 to 1.5 V at idle and rise with revs, TPS wil sweep smoothly, rpm will be a pulsed signal). Tradeoff is it takes longer, but it avoids killing the ECU by tapping the wrong pin or shorting a sensor reference. Also worth saying, on these imports an SAFC can cause more problems than it solves if the ECU is closed loop most of the time, and some 1MZ setups will throw fuel trim codes or run odd if the MAF is being altered too aggressively. If your aim is just mild fuelling correction, keep changes small and make sure you are watching trims. Cheers, Dave

Brill, thanks all - super helpful as ever.