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Help with S16DG118 - M620 on IAW59M

Posted: Wed Oct 29, 2025 10:18 am
by antonye
Hi

I am trying to turn the immo off on an IAW59M with S16DG118 for a M620.
I am using writer v314c and after writing, Diag gives me the usual "ECU Stored" when checking immo status.

However, on the bike the immo light stays on and the bike will not start.

This is not the first time this has happened with the S16DG118 software on other bikes.
It also seems that I cannot use a different software on the IAW59M as these too will not unlock/start the bike.
I have successfully used an IAW5AMHW610 with an unlocked ECU to start other bikes, but this has not worked on this particular M620.

Does anyone have any experience with getting S16DG118 to unlock, or with an alternative software version that works with a bike expecting S16DG118?

Thanks

Re: Help with S16DG118 - M620 on IAW59M

Posted: Wed Oct 29, 2025 10:48 am
by jpl250rs
If it write ecu stored ,immo is disabled 100%
The immo light may still on yes , but that’s not the dashboard who decide it’s the ecu . Dashboard kept saying to the ecu immo is active , ecu don’t listen it

Your issue is elsewhere

On older bike there where also an immo box , can you confirm if the antenna is connected directly to the dash or to an other device ?

Re: Help with S16DG118 - M620 on IAW59M

Posted: Wed Oct 29, 2025 11:37 am
by antonye
Thanks JP, I didn't check for the immo box as I though they were only on the S4s and ST range.

I'll have another look and see what happens. I may also disconnect the clocks as I have had other bikes running without them connected, a popular mod in the Desmo Due Race Series where they remove the IMMO and then use aftermarket clocks.

I will update this thread once I've had another play :)

Re: Help with S16DG118 - M620 on IAW59M

Posted: Wed Oct 29, 2025 12:24 pm
by jpl250rs
Yes with immo off you can remove dashboard
Ecu don’t care if dash is here or not

I’m not saying there is an immo box but as the bike is quite. Old we never knows

I would test if ignition and injectors are working with test menu
The starter itself with its fuses and relay

And also the top dead Sensor

Re: Help with S16DG118 - M620 on IAW59M

Posted: Wed Oct 29, 2025 9:24 pm
by antonye
The immo light stays on after key-on, so the dash thinks it is immobilised!

Re: Help with S16DG118 - M620 on IAW59M

Posted: Thu Oct 30, 2025 7:51 am
by jpl250rs
yes but if immo is disabled into the ecu , that's not an issue.