K series management q's

2F45T4U · Post by **2F45T4U** » Tue Dec 04, 2007 6:50 pm

a few quick questions as im new to the Elise and have only looked at the car twice.

is the ECU protocol OBD-II
and
is the ECU map a Lotus tune or straight from Rover?

cheers

mac · Post by **mac** » Tue Dec 04, 2007 6:57 pm

Is it an S1 or S2 elise

S1 runs EU2 - S2 runs EU3

S1 runs a standard Rover controller and isn't OBD II - S2 runs a Lotus K4 controller with lotus written map and is OBD II complient

Mac

2F45T4U · Post by **2F45T4U** » Tue Dec 04, 2007 6:58 pm

mac,
its an S1
whats 'EU2'? the engine code?

if it isnt OBD2 what is the protocol for the diagnostis

mac · Post by **mac** » Tue Dec 04, 2007 7:03 pm

I'm not sure but if it's an S1 then it will be an EU2 car and runs the Rover MEMS ecu.

I don't think on board diagnostics were required at the time and I've not seen a way into it.

Mac

PS: Robin may have more detailed information on ways into and out of MEMS

Mac

robin · Post by **robin** » Tue Dec 04, 2007 9:59 pm

MEMS is not generally believed to be end-user or even dealer mappable; of course it would be as it is a microcontroller and s/w jobby; having said that, there is an access protocol that the Lotus Scan tool (and the Rover equivalent) use to talk to the ECU for trouble shooting, code matching, etc.

That protocol is not publicly documented AFAIK.

EU2 and EU3 refer to the Euro emissions legislations that the engines were built to conform to - EU3 engines have fully sequential injection rather than batch injection; EU3 engines also have pre- & post- catalytic converter O2 sensors, plug top ignition and a cam position sensor to aid in injector and ignition timing.

A truly committed individual could reverse engineer the protocol and/or work out how to reprogram the device; but unless you have years of time that you can dedicate to this task, buying a mappable ECU is way easier

Cheers,
Robin

hiscot · Post by **hiscot** » Tue Dec 04, 2007 11:34 pm

i believe eu3 poss 2 ? can be flash programed by a dealer with set maps

BiggestNizzy · Post by **BiggestNizzy** » Tue Dec 04, 2007 11:55 pm

http://www.gaima.co.uk/peter/RoverMEMS.pdf
http://matsone.csuhayward.edu/tms/coope ... erview.htm
http://www.mgfcar.de/library/ENGINE_MAN ... MS_1.9.htm

my mems links, not much there I'm afraid