Leafy

iTrader: (1)

Somewhere in my patch harness from trackspeed the aem ecu connects to the dash. So there must be a wire that goes to the ecu to the dash. On the 1.8 at least.

Zaphod

1.8 is different.

Leafy

iTrader: (1)

Maybe, but stock my car still took the tach signal from the ignitor in each coil. You really just need to find the wring diagram from a 96 euro FSM.

Zaphod

I have that here and already tried a sketch in page 1 on what I have to do...



My problem is that there is only a wire going from the igniter to the dash - as I will throw out the igniter there will be nothing firing the tach in dash. TO the igniter there are only two wires going from the ECU/MS - which I will both need as trigger for my coils. I thought one of the other 1,6 swapper could tell me their solution...

shuiend

iTrader: (24)

It looks like that Yellow/Blue needs to go from your MS to your tach.

Braineack

iTrader: (62)

what coils are you using?

Zaphod

Plan is to use the OEM VVT coils

Braineack

iTrader: (62)

okay and you're saying you wont be able to send the tachout through the B/W wire to the ignitor and splice that the the Y/B?

Zaphod

By B/W wire you mean the Nr. 5 B/W from your picture at the Toyota COPs thread?



That wire is not existent on that Euro past '93 MX-5 1.6...
See here:



So I think I will make a new wire to either the igniter or directly to the tach.

Leafy

iTrader: (1)

Wait wait wait. If thats the case the tach should be getting signal directly from the ecu already.

Zaphod

Crazy ****... it's getting the tach signal from the igniter module...

Here is the cutout from the Factory wiring diagram for the car:

Instruments:


Igniter:


You can clearly see, that the tach signal comes from the igniter...

shuiend

iTrader: (24)

Is it the B/W wire at place 3 in the first picture? Can you unplug your gauge cluster and find the b/w wire there and then check continuity to the b/w wire on the ignitor?

Zaphod

No B/W wire at the igniter connector:



The Y/L is going from the igniter to the dash/diagnostic connector.

shuiend

iTrader: (24)

Is that not a b/w wire that I circled in red?

Braineack

iTrader: (62)

looks like it. his diagram says it should be blue, but that doesn't look like a blue wire and i almost make out a white stripe right where it's going into the connector.


what is the blue wire going to the kraffstoff pumpen relay supposed to be?

Zaphod

**** it.. this ought to be a "L" aka blue wire but it is indeed a B/W wire

I cleaned it a bit:


Now I have to see if there is a wire at 2I at the ECU because that would be the spot for the B/W wire at the 90-93 1,6 ECUs.

Braineack

iTrader: (62)

so you should be able to run tachout through that white/black wire, then tie it into the yellow/blue somewhere ove rhte rainbow to send to dash.

Reverant

iTrader: (10)

IIRC that black/white wire is the 12V.

Braineack

iTrader: (62)

yeah, but it's a pull up from the ECU for the tach signal.

shuiend

iTrader: (24)

Also just see if you can check continuity between that pin on the plug and the b/w pin at either the ECU or gauge cluster to see if it is the correct one.