Bloody immobiliser ST4S

Les toogood · Mar 3, 2026 at 5:40 PM

Desmophil said: ↑

Looks like I have an issue with my immobiliser again.

Sso far I got going again resetting with red key.
But not this morning.

Does anybody know if I can bypass it? (the risk of ST being stolen are quite low, risk of being stranded at this point much higher...)

Alternatively do you know if Ducati still sells them and how much they are?

Thx
p
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Les toogood · Mar 3, 2026 at 5:42 PM

chrisw said: ↑

The Orange One has made it difficult to conduct things by post. Check your PM later.
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Whats the answer to it who does it

Les toogood · Mar 3, 2026 at 5:47 PM

chrisw said: ↑

I recently resolved an immo problem that Ducati John Cellier had in his workshop. The IAW59M ECU for the ST4S is coded to the chipped keys. There is an external immo box which is found to the left side of the headlight when the cowling is removed. If the immo is disabled in the ECU then the bike will start but the immo light will constantly flash on the clocks. However, if the immo box is removed then the bike will start and the immo light will stop flashing. We initially tested this with a secondhand ECU to make sure it worked. I then flashed the original ECU with immo off. I can do this for you if you pick up postage costs.
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chrisw · Mar 3, 2026 at 6:32 PM

Check your PM

Desmophil · Mar 3, 2026 at 7:40 PM

I am not sure who that is for and I have no PM.
That's an old thread - that ST4s is long gone.
But who knows, I have bought another one (newer shape), so who knowns when I will next need to tinker with the immob!! ;-)

Bloody immobiliser ST4S

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