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2003 620S ECU data Bad

Posted: Tue Nov 11, 2025 7:58 pm
by mcsputnik
Greetings,
Inherited a monster 620S with a chopped rear end and no Cat.

Plugs are soaking wet, guessing I need to update the ECU map.

However, this is all that gets spit out when I try to register:


IAW59MHW010
00

0000

00 00 00 00 00
LOADF:2.10
20 02 11 26
Pas de n° de série

which is rejected when I submit.

Re: 2003 620S ECU data Bad

Posted: Tue Nov 11, 2025 8:42 pm
by jpl250rs
iaw59 don't need licence for activating buttons

Re: 2003 620S ECU data Bad

Posted: Tue Nov 11, 2025 9:22 pm
by mcsputnik
understood, im able to get reasonably accurate data from JPdiag, and dont "need" to register.

However, among other things I wanted to check was that the dash mileage matched.

Was curious if anyone had seen a similar bug, and whether filtering was useful or what ended up concluding.

Re: 2003 620S ECU data Bad

Posted: Tue Nov 11, 2025 9:25 pm
by mcsputnik
Also, also I assume if I want to use the ECU map dump (ECU276c) I need to register?

Re: 2003 620S ECU data Bad

Posted: Wed Nov 12, 2025 8:36 pm
by jpl250rs
if you want to reflash , you need to purchase a writer licence.
you cannot check the mileage with jpdiag