Marelli 5sm Tuning 2012/13 OBD Interface -- Solved;) - MVAgusta.net
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post #1 of 11 (permalink) Old 02-23-2017, 11:44 AM Thread Starter
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Marelli 5sm Tuning 2012/13 OBD Interface -- Solved;)

Hello, Folks
After 4-months of work David at Rexxer and I have determined the correct harness for tuning 2012/13 5sm bikes with the under-seat OBD. In fact, we did not use the under seat connection for tuning. There is a single wire on the right side of the bike, under the tank, as shown in the owner's manual as the OBD, attached to a three-pin adapter which provides access to tuning. This is an odd configuration, as most bikes have 3-wires going to this adapter, which serves as the OBD. I know that this sounds odd, considering the can +/-, but it works perfectly. One wire for tuning connects to the Rexer harness, which has positive and negative leads for the battery terminal. Installed my new map today, reset tps and adaptives and bike runs great.
CB
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post #2 of 11 (permalink) Old 02-27-2017, 09:25 PM
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Hey sorry about the basic questions but what bikes does this apply to? Are you accessing can data? Is this connection made with tuning hardware/software or a serial connection to a computer?
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post #3 of 11 (permalink) Old 02-28-2017, 03:55 AM
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Originally Posted by steelmill View Post
Hello, Folks
After 4-months of work David at Rexxer and I have determined the correct harness for tuning 2012/13 5sm bikes with the under-seat OBD. In fact, we did not use the under seat connection for tuning. There is a single wire on the right side of the bike, under the tank, as shown in the owner's manual as the OBD, attached to a three-pin adapter which provides access to tuning. This is an odd configuration, as most bikes have 3-wires going to this adapter, which serves as the OBD. I know that this sounds odd, considering the can +/-, but it works perfectly. One wire for tuning connects to the Rexer harness, which has positive and negative leads for the battery terminal. Installed my new map today, reset tps and adaptives and bike runs great.
CB
Ever thought of just getting a Microtec instead of all this hard work ?

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Hey sorry about the basic questions but what bikes does this apply to? Are you accessing can data? Is this connection made with tuning hardware/software or a serial connection to a computer?
It's for the bikes with the older 5SM Magnetti Marelli ECU.

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post #4 of 11 (permalink) Old 03-06-2017, 08:28 PM Thread Starter
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Total cost was $600 from Rexer, which includes map and programming/diagnostics unit. I can check codes, reset tps and adaptives, and remap for mods or get dyno tuned at my local shop (using Rexer). Also able to switch back to the stock map, which is a nice feature. Hard work was finding the right interface wiring, which is misleading because it varied for a few years. I posted this to help folks who have the 4pin obd underseat and single can running to a three pin connector under the right front tank with the Marelli 5sm having throttle response issues looking for an inexpensive tuning solution
I am not affiliated with Rexer
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post #5 of 11 (permalink) Old 03-06-2017, 10:04 PM
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Quote:
Originally Posted by steelmill View Post
Total cost was $600 from Rexer, which includes map and programming/diagnostics unit. I can check codes, reset tps and adaptives, and remap for mods or get dyno tuned at my local shop (using Rexer). Also able to switch back to the stock map, which is a nice feature. Hard work was finding the right interface wiring, which is misleading because it varied for a few years. I posted this to help folks who have the 4pin obd underseat and single can running to a three pin connector under the right front tank with the Marelli 5sm having throttle response issues looking for an inexpensive tuning solution
I am not affiliated with Rexer
I did not say you where affiliated with Rexer mate, just wondering why you went the Rexer way and not Microtec ?

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post #6 of 11 (permalink) Old 03-14-2017, 07:46 AM
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Good work steelmill.

I have been working with the comms on my 2011 B4 10900rr and have managed to read the map from the ecu. I know the 2012 is different but do you have a copy of the map so i can do a comparison.
Also that wire is a K-line. I managed to get JPDiag which is a free Ducati diagnostic software to communicate with the MV using the K-line and a positive and negative connection the the OBD2 Socket.

Mike
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post #7 of 11 (permalink) Old 03-15-2017, 08:47 AM Thread Starter
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Sure.PM me
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post #8 of 11 (permalink) Old 03-16-2017, 11:09 AM Thread Starter
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Hi, Donsy
Sorry for the late reply. No reason really. Just looking for a solution and found Rexer. Had I known about Microtec, might have gone that route.
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post #9 of 11 (permalink) Old 03-16-2017, 10:40 PM
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Hi, Donsy
Sorry for the late reply. No reason really. Just looking for a solution and found Rexer. Had I known about Microtec, might have gone that route.
No problem mate, as usual I'm just very curious.

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post #10 of 11 (permalink) Old 03-19-2017, 03:45 PM Thread Starter
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I am new to MV, but not new to tuning cars -- STI and Evo. I decided against dyno because in my experience the most powerful pull does not always equal a balanced tune. I'm quite certain that a great tuner can do both, and it seems like there are a few on this forum, but we don't have anyone really spectacular in my area.
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