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Post Info TOPIC: Deceleration cutoff subroutine


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Deceleration cutoff subroutine


Hey guys,

this is about a '07 GSR600, the software is very similar to the '04-'05 GSX-R 600 and the GSX-R 1000 with the 41G00 code.

I have identified most of the important maps and map selection routines. I know that the software cuts fuel during deceleration based on throttle position (because you can bypass it by calibrating the TPS wrong on purpose) and probably RPM because it doesn't happen below 4000. Gear position also seems to play a role because feels harder in higher gears when it should be lighter because of the laws of physics.

Can anyone point me in the right direction?

Best wishes to all the hackers on here
clrokr

PS: I will upload the GSR600 bin as soon as I am completely sure my immobilizer code isn't in there somewhere.



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st.briege@hotmail.de    contact in Germany



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http://motorsport-brix.de/



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Not smart enough to help you with deceleration. But immo code should be stored on separate eeprom.
As long as its somewhat like 41G00 and uses S.A.I.S i will bet a BigMac its on the 8-pin "93c66" IC.

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Hey Twice,

yeah i think it has the S.A.I.S. immobilizer. Do you by any chance know what serial port the eeprom is connected to?

clrokr

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Sorry never tried myself yet, since one can disable the immo i never had a need.
But ecu´s i have seen that have been reprogrogrammed they have all been cut open down to the IC and probably read/written straight off the pins.
(Just a guess so take it easy)

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Clokr,
To find the cut-off funciont, the help of the Assembly guys is needed,
its AGES i am asking one of them to expose such map, but so far no luck !
But i found a workaround:

If your gsr have the same secondary plates as Gsxr does,
with the same mechanical "fast idle" system
(Basicaly when the secondary butterflies are fully open,
they mechanicaly open the primaries by like 5-6% )
then you can set in the STP map a full open ratio
at 0% TPS, this will keep your tps always >0
but it will also lower your engine braking.
up to you to use this workaround.


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If i overwrite the STP maps with 100% entries, will the ecu compensate this? Is there a map that adds fuel based on secondary throttle position? Because if there isn't, the engine will run even more lean at low (less than 7000) revs. I am an assembly guy and i have identified a number of subroutines. Just not the one i was looking for all the time. There has to be a memory addres with flags for fuel and ignition cutoff that is read by the respective routines. It is written to by the limiters. This is probably the same global variable that is used by the deceleration cutoff thing.

clrokr



-- Edited by clrokr on Sunday 24th of June 2012 04:55:56 PM

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-- Edited by kwaka10r on Saturday 29th of September 2012 07:20:16 AM

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Did you ever have any luck on this? Trying to dig into a 2013 zx6r denso ecu.

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