Relay Board Wiring

[eightvalver]

Ok I'm looking at the relay board wiring:
is this correct:

INJ 2: ground to injector
INJ 2: ground to injector
INJ 1: ground to injector
INJ 1: ground to injector
FP: to fuel pump +
FIDLE: to fidle solenoid
S1: ????
S2: ???? what are these for
S3: ????
S4: ????
S5: ????
Vref: tps
TPS: tps
TPS ret: tps ground???
Tach: to tachometer or MSD unit???
MAT: is this IAT sensor????
MAT ret: i dont even know where that goes
CLT: coolant temp sensor?
CLT: coolant temp sensor ground???
O2: to O2
Injector +12V: to + of injectors

thanks

[catalystracing]

Thanks for answering that, Lance - I had the same questions.

Mine, however - the MAP sensor wires, where do they connect?

I figured MAT was Manifold Absolute Temperature or some such IAT
thing, so that's where I put the IAT.

I don't know what to do with my remote-mounted MAP sensor, though - it has 3 wires:

Black
Grey
Grey with white tracer

Thoughts? It is an a-e-a.com unit.


Thanks!


Iain (I don't have a-e-a's instructions, either - I'm pretty sure they were GIVEN to me, with the MS, but I'm pretty sure I put them Someplace Safe. I'm sure they're safe, wherever they are....)

[DCU1976]

S1 to S5 were originally spares, though they have now been assigned to IAC stepper control (S1 to S4) and ignition control (S5) for MS-II.

So do I need Megasquirt2 in order to use my IAC, or is there a mod for the Megasquirt to give it IAC control? Also, what all would need to be done on the relay board to give it IAC funtionality, Thanks!

[DCU1976]

Lance,

As I was installing the megasquirt, I realized that I would need IAC control, unless its not necesarry?!

Yes, I do have a stepper style IAC (4-wires). So, I guess it's Megasquirt2 for me, unless anyone else has an idea. Can someone please post the link to the mod for the Megasquirt and relayboard... Thanks everyone!

[Workaholic]

Ok, I am trying to figure out which wire goes go where on the relay board from my factory wiring harness. so Am I just to copy the db37 cable list above in terms of what each wire is for based upon the labels?

Thanks
Tom

[914Nick]

i'm using MS1 v3.0 pcb, so i was wondering about those s1-s5 outputs on the relay board.
what pins do those outputs correspomd to on the db37?
how do the spr1-spr4 on the MS pcb translate to on the relay board? i want to use two ignition coil drivers (vb921), i know that the first one comes out at s5, but if i connect the 2nd one to spr1 on the MS pcb, where will it come out on the relay board?
Regards
Nick