Godless Commie

iTrader: (2)

First off, I do not know much about MS.

I am asking for help for a friend who is trying to install ms into a European Spec '93 MX5, with little to no luck, so far.

He had a hell of a time trying to get the correct ECU pinouts for that specific model.
Apparently, nothing matched the US version as far as pinouts go.

Now, there is a no start problem.

He told me that even though he could verify the crank signal on a scope, the MS would refuse to see that signal.
He seems to have figured a workaround for that, now the ms tells him the engine is rotating at 1 (one) rpm at cranking.

He is using a SMD board.

Here is the info he gave me:

D1 & D2
XG1 to XG2
TachSelect to OPTIN
TSEL to OPTOUT
pull up circuit built with jumpers.

msq and msl files are attached.

Joe Perez

iTrader: (8)

This sounds vaguely familiar.

I think that it's only getting one of the two signals that it needs- either crank or cam, but not both.

Godless Commie

iTrader: (2)

You mean, he should check and verify both signals are there?

Sorry, like I said, I am pretty MS ignorant. Never delved into it so far.
So, please excuse any stupid questions.

Reverant

iTrader: (10)

Your friend can send the ECU to me, I will fix it free of charge and send it back to him for whatever the cost of shipping is. Is it an MS1 or an MS2?

Godless Commie

iTrader: (2)

Holy crap.. That would be awesome..

Let me talk to him.

(We would owe you dinner then. Would that be a problem?)

Godless Commie

iTrader: (2)

Apparently it is a Ms3x v3.57 standalone, with an smd board.

Joe Perez

iTrader: (8)

Yes, I think that the CMP (g) signal is missing. In fact, I just went back and re-read your first message:
All of that describes the primary trigger input (CKP or Ne) however there's no mention of a secondary input.


Can you give us a clear photograph of the top and bottom of the board?

Or, just look at pin 11 of the CPU as well as terminal JS8. If neither of those have a wire / capacitor / resistor going over to one of the spare pins on the DB37, that guarantees that the second-trigger modification is missing.

Godless Commie

iTrader: (2)

Will post pics as soon as possible.
He needs to take the pics first.