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Reviving the dead thread???

I have an Esel039 in my SE.
The car runs pretty good for track work so no this not a tuning question.

Anyway, I have had what I though was an alternator failure a few weeks ago, but after checking 4 alternators(3 spares were in a working state when last used), and all the wiring I have come to the conclusion that the regulator circuit in my ECU is dead.
Awaiting possible repair solution from Adaptronic, but its not looking promising as parts seem to be an issue for an older ECU.


Now has anyone ever analysed the signal the ECU sends to the alternator?
On the NB8B application this is the grey wire with red stipe that goes from Pin 3M on the ECU plug to what I'm assuming would be the alternator exciter circuit.

See attached my 2 CRO captures.
You can pretty much see why I believe the O/P out the ECU is not right
I don't think the signal should be 200MHz!!!

Sorry forgot to change the probe multiplier for the first shot.


This is showing across 25ns. Yes nano seconds.

Luke you can contact adaptronic and i know they can test it for you and if is a problem can prob fix for you

Luke wrote:Awaiting possible repair solution from Adaptronic, but its not looking promising as parts seem to be an issue for an older ECU.

mx589 wrote:Luke you can contact adaptronic and i know they can test it for you and if is a problem can prob fix for you

Yes, did that on Monday.
They don't have spare boards or complete modules.
They are trying to see if they have components to do a component level repair.
The last they said about their test jig is they were checking if it even supports this older ECU now.

BTW they are literally 5 minutes up the road from me so very easy for me to go and drop it off.


I do have 2 alternate solutions if its not repairable, but would obviously prefer the regulator to be in the ECU for wiring tidiness.
Solution 1: Standalone alternator controller, ie "Jasons" circuit. This is what is already implemented in the ECU.
Solution 2: Fit a NA8 alternator.
Both options need a little bit of re-wiring, and probably some ECU re-programing to disable the inbuilt alternator function.

5 mins down the rd your laughing.
Hopefully they can sort out
If not na alternator prob your best easiest way to get it going again

Well unfortunately it has been confirmed.
They cannot even get the bits that would be required, so bypass surgery it is.

I will go with the standalone controller to keep my NB alternator since I already have 2.

Dammm thats no good. Got a feeling adaptronic will die in the a** now since haltec bought them out
shame my ecu has been great

Hi. On slow convergence the ECU tunes to a lean AFR. Trim reads -7 or so. 440 universal on BP engine with TPS control. Any ideas.Cheers

Hi. On slow convergence the ECU tunes to a lean AFR. Trim reads -7 or so. 440 universal on BP engine with TPS control. Any ideas.Cheers