Re: 91 Lotus Carlton ECU

["nacelp" <nacelp@bright.net>]

> If I knew what the 'OB mask' is I would answer your question.

At location 0008 on the less than, equal to 256K proms, is where they
usually ID the program, and code of a paticular .bin file.

At a guess,
> you are on about Broadcast codes, but since I don't know what they are
> either, I still can't help. If you let me know what to look for (either
> inside or outside the ECU), I'll see if I can find out.

I was just curious if someone had already hac'd that particular series of
code.
>
> The ECU is not in the engine bay, but behind the passenger side glove box,
> and it is a real git to get out. The 4 big multipole connectors do have
> seals on them, but I doubt the unit is water proof. But I'm not driving my
> car into a river to find out for you ! <g>

having 4 plugs tells me it is the water resistant P4 ecm

> The ignition uses a wasted spark DIS with 3 ignition coils. The individual
> coils look very like the ones in the diagram in Lt5dis05.jpg on the ftp
> site, although obviously there are only 3 of them.

Thanks

> If you need any other info on what sensors the ECU uses, let me know.
Also,
> I do have the workshop service manual for the car, which contains about
100
> pages of info on diagnosing with a Tech1 scanner via the ALDL port (which
> is under the bonnet, not under the dash !!) This includes details on
> trouble codes,BLM and nominal ECU values. The problem is I only have it in
> paper form, and I can't work up the enthiusiasm to scan it all in, create
a
> PDF, and post it on the ftp site. If you think you could use the info, let
> me know and I'll try and get more enthusiastic.

I probably can figure it out from here.

> I guess (from the times on most of your EMAILS) that most of you are
> stateside of the pond. So when it comes to sharing information, just think
> how lucky you are. You have the "freedom of information act", whereas we
> have the "data protection act".

The FOI act is fine in theory sorta, but the major manufactureres were
supposted to release the prom data ages ago, and the lawyers have keep it
under wraps since about 1982, so doesn't always help much.

 This means I can't even get official
> information on what my name is, never mind what a memcal is !! I don't
> credit people by name on public lists just incase what they tell me
> privately is 'secret'. So please don't take offence if you were one of the
> people that helped me with my earlier postings.

Ah ha....  darm limies with their excuses  <g>...
Grumpy
>
> Cheers,
> Malcolm Robb, LC 0112G
> A certified nutcase and Turbo freak
>
> -----Original Message-----
> From: nacelp [SMTP:nacelp@bright.net]
> Sent: Monday, March 13, 2000 6:22 PM
> To: gmecm@diy-efi.org
> Subject: Re: 91 Lotus Carlton ECU
>
> Anyone happen to have a Hac of the OB  mask?
> Is the 331 a weather resistant ecm (under hood)?
> Is this distributor or DIS?
> Turbo Freaks?, Turbo Freaks?, I represent that statement <g>..
> Grumpy
> BTW thanks for the sharing
>
>
> Subject: 91 Lotus Carlton ECU
>
>
> > Hi There,
> > I have just discovered how to upload info onto ftp sites, so if anybody
> is
> > interested I have uploaded 91_Lotus_Carlton_ecu.bin onto the diy_efi ftp
> > site. The Lotus Carlton is has a straight 6, 3.6 litre, 24 valve engine,
> > with two paralleled Garret T25 Turbochargers and a water cooled
> intercooler
> > (Lotus call it a Chargecooler). There is a single antiknock sensor, 2
> > lambda 02 sensors, and MAT, MAP, IAC etc sensors. Standard production
> > engine output is supposed to be 377BHP and a Max torque of 419ft/lb.
Some
> > nutcases here in the UK have 'chipped' these engines to 450, 550 and
even
> > 650 BHP. - Not bad for only 3.6L.
> >
> > The label on the outside of the ECU states :
> >
> > SERV. NO. 01228331        AWSX
> > 867519  M011201519
> > 16157519
> >
> > BAR CODE THINGY
> > *867519M011201519*
> >
> > However, the label on the EPROM states : DELCO AXSH 2423. So beware - I
> > don't know which is correct.
> >
> > According to another member of this list who was kind enough to reply to
> my
> > previous posting, this means that either Lotus changed the EPROM after
> > fitting the GMP4 to the car, or the GMP4 came from a different car. It
> > doesn't matter much to me. But the same list member also says that turbo
> > capable software is in demand, so for any turbo freaks out there, please
> > help yourself to it.
> >
> > Cheers,
> > Malcolm Robb, LC 0112G
> >
>
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