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 Landrover GEMS? 
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 Post subject: Landrover GEMS?
PostPosted: Sat Oct 11, 2014 10:26 pm 
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Hi Peter, As the GEMS system on older P38 Range Rovers used the T4 (same as the MEMS and older Rover Systems used), I wonder if it woudl be possible for your system to connect to it as well? It would open another market, and also as I have a good old P38 help me out too!


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 Post subject: Re: Landrover GEMS?
PostPosted: Sat Oct 11, 2014 11:06 pm 
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The landrover market is there for the picking on the following models with what you have currently I reckon.
Discovery 1
Discovery 2
Freelander 1
Range Rover P38a

These pretty much use rover stuff.


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 Post subject: Re: Landrover GEMS?
PostPosted: Sat Oct 11, 2014 11:55 pm 
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Noted.

I do have a have a very long list of things to do though.

I also need to do the 5AS and stop people buying those knock off Chinese clone tools.

Was the GEMS fitted to any Rovers at all or only LandRover products?

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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 9:55 am 
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The 2.0 l Discoverys had a MEMS ecu fitted.


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 1:10 pm 
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I think GEMS was Landover version of MEMS


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 4:27 pm 
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Gems refers to the single plenum 4.0/4.6
whereas thor is the later management on p38a range rovers

Discoverys have siemens ecus, freelanders are basically nearly identical to rovers.

Defenders do use disco engine management on the td5, no bcm


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 4:36 pm 
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As GEMS uses T4 as the Rovers do I assume it's 'compatible' though with the right software?


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 4:55 pm 
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The 4cyl 2l mpi Discoverys have a MEMS ecu fitted. I think the GEMS was only fitted to the V8


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 12, 2014 4:58 pm 
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Yea mine is a V8 4.6


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 Post subject: Re: Landrover GEMS?
PostPosted: Mon Oct 13, 2014 4:57 pm 
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What did the MGB RV8 have ?

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 Post subject: Re: Landrover GEMS?
PostPosted: Mon Oct 13, 2014 5:08 pm 
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Looking at http://www.v8register.net/subpages/RV8N ... pdated.htm it appears to communicate with T4 so maybe another form of MEMs?


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 Post subject: Re: Landrover GEMS?
PostPosted: Mon Oct 13, 2014 7:51 pm 
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The Freelander KV6 used the same Siemens EMS200 as the ZS/45 and ZT/75 KV6's.

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 Post subject: Re: Landrover GEMS?
PostPosted: Mon Oct 13, 2014 8:13 pm 
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pscan.eu wrote:
What did the MGB RV8 have ?


The RV8 had Lucas multi point injection and a traditional distributor so probably had a Lucas ECU for ignition as well.

There was a period when Rover ran separate Lucas ECU's for fuel and ignition just before they went back to MEMS when they introduced injection and cats for the '92/93 emissions regulations.

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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 26, 2014 4:03 pm 
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Could I do any damage by plugging it in to my Landy and seeing what it does? I would imagine on obd it should report stuff?


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 26, 2014 6:13 pm 
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It can't see it doing any harm, but in case there are any lawyers on here it has to be at your own risk.

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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 26, 2014 6:16 pm 
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Hehe OK no problem... I assume it just acts like an odb scanner in that mode anyhow.


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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 26, 2014 6:30 pm 
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yes it behaves just like any other OBD2 scanner

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 Post subject: Re: Landrover GEMS?
PostPosted: Sun Oct 26, 2014 6:36 pm 
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Cool. Will let you know what happens!


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 Post subject: Re: Landrover GEMS?
PostPosted: Mon Oct 27, 2014 4:16 pm 
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pscan.eu wrote:
What did the MGB RV8 have ?

The MG RV8 used the 14CUX ECU that was sourced from the Range Rover classic.

It has a different diagnostic plug than the Land Rover one.

John


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 Post subject: Re: Landrover GEMS?
PostPosted: Sat Nov 15, 2014 4:00 pm 
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Finally got round to plugging in to my Landy....

It kicked in fine. Found interface etc. I chose EOBD option and it flashed something about 'suspect 12v + on K Line' or similar, then connected to the ECU.

It found a couple of fault codes and allowed me to clear them. However when I went to live data I opened each and it didn't show any actual live data.

Hope that helps to decide if it may work in the future?


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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Nov 18, 2014 11:43 pm 
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AdamElphick wrote:
However when I went to live data I opened each and it didn't show any actual live data.


Have you tried any ELM327 interfaces or other OBD2 scanners on it?

I think that live data should work so this is looking like a bug in our software. I don't have access to a P38 to work on it though.

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 Post subject: Re: Landrover GEMS?
PostPosted: Thu Nov 20, 2014 9:13 am 
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I've got a Bluetooth obd2 adapter and that communicates ok, although Torque gives a lot less info than your interface can potentially give.


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 Post subject: Re: Landrover GEMS?
PostPosted: Wed Mar 23, 2016 9:07 am 
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Did the P38a comms get any further? I've got to remove my P38a 4.6 engine soon for some core plugs and oil leaks. Would be great to be able to connect before removal and check everything over, in case the old guy needs anything else while it's out.


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 Post subject: Re: Landrover GEMS?
PostPosted: Thu Mar 24, 2016 2:46 pm 
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I have an ebay bid on a GEMS ECU at the moment.
It depends how expensive it gets.

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 Post subject: Re: Landrover GEMS?
PostPosted: Thu Mar 24, 2016 2:57 pm 
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Great news - fingers crossed it doesn't go up too much!


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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Mar 29, 2016 3:38 pm 
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GEMS ECU arrived today.

Do any of you have a wiring diagram and picture of the connector on the ECU so that I can power it up?

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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Mar 29, 2016 3:49 pm 
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I've got the Rave at home...... Could probably zip it up and pop you a link.


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 Post subject: Re: Landrover GEMS?
PostPosted: Fri Apr 01, 2016 4:48 pm 
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Sent you a pvt message with link to RAVE I uploaded


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 Post subject: Re: Landrover GEMS?
PostPosted: Fri Jan 13, 2017 11:32 am 
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Hi,

Did this project get any further? If you need any testing let me know. My Rangie (after I took the huge 4.6 out to do a mni-refurb on it) is now my 50/50 driver with my TF so would be useful to have diagnotics for it :thumbup:

Thanks,
Adam


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 Post subject: Re: Landrover GEMS?
PostPosted: Sat Jan 14, 2017 6:44 am 
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I've been hearing about the need for GEMS diagnostics from Range Rover P38 owners, it'd be good if the Pscan could do these cars too.


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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Jan 17, 2017 11:19 pm 
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I tried out this GEMS ECU that I have. It says GEMS 8 and 4.6 (in biro) on it.

Pscan 0419 is able to read error codes and live data on it using EOBD slow init.

Another that I have has some more advanced features, specifically security (I guess 10AS) learning and adaptation.
I will have a look at replicating those features in pscan as well.

It look like it might be quite simple, touch wood.

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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Jan 17, 2017 11:24 pm 
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Great news! I'll give it a go on my Rangie at the weekend!


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 Post subject: Re: Landrover GEMS?
PostPosted: Sat Apr 14, 2018 9:19 am 
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Realised I didn't reply! .... Rangie has been off the road since just after my last reply with a knocking engine.... I now have a spare car/engine and am in they process of swapping it over so hopefully I'll test it soon.

Sent from my CLT-L29 using Tapatalk


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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Apr 17, 2018 4:51 pm 
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We have a GEMS ECU in the lab, and we have reverse engineered the cryptographic login algorithm.
It still needs a bit more work before releasing it to customers though.

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 Post subject: Re: Landrover GEMS?
PostPosted: Tue Apr 17, 2018 5:21 pm 
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Great news! Thanks for the update

Sent from my CLT-L29 using Tapatalk


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