ms2 v3 can anyone help with mods for iac, dual speed fan and knock sen

[MikeD]

I am trying to set up an ms2 v3 for use on "Koya" JAD's 109 with a 1uzfe engine (see build elsewhere). As a megasquirt virgin I would like to know if I am on the right lines or just wandering around in the wilderness. We are getting close to connecting power to the MS2 for the first time ever and I would rather it didn't produce a firework display

the iac has 4 wires and apparently takes up to 1.5a which means adding transistors as if they were relay drivers. I thought I would use BD237 transistors as they are rated at 2 amp anyone think that would be ok? or should I use TIP31. I presume no heatsink as they are either on or off. Would I also need suppressor diodes as per the relay circuit?

if I am using the 4 iac outputs for this and I want to run a dual speed fan through relays I think I can use Fidle to control one speed and perhaps the injector led output for the other speed, using standard land rover relays I think this should be ok just driving from the standard transistor. Does this sound right?

finally, the 1uzfe has two knock sensors and no conditioning circuitry as far as I can see. Does the panel think that MS2 can handle two knock sensors or shall I leave one disconnected? not sure if that is practical either as sensors are currently one per bank

Thanks Mike

[FridgeFreezer]

Depends what the state of the ECU is that you've bought/built - was it modified beforehand to suit any particular engine or setup?

I'm not familiar with all the IO options the MS2 gives regarding fans and whatnot, best bet is look on the Megasquirt forums to see what others have done.

[MikeD]

It was bought as a kit from Nigel (I believe), I assembled it and chose the blocks to assemble from what jad told me we need to control. I made the kit at least 6 months ago and we are only just getting to the point of having the 109 sufficiently cabled to think about turning it on for the first time. Slightly out of my comfort zone but then producing the whole car loom from scratch has been "interesting" to say the least. Beginning to lose count of how many times I have found things that have been "forgotten"

I have decided to use the "typical spare port output circuit" driven from the IAC cicuits but am uprating the transistors to handle the higher current of the control valve on the 1uzfe (I have read this draws up to 1.5amps)

From another forum I have been advised the knock circuit in the MS2 can only handle one sensor per engine and that it is probably best to leave this off at this stage