The 848/1098/1198 immobilizer coding is not in the ecu, it;s in the dash. I believe the 749 / 999 was coded to the ecu. When you're buying 848/1098 dash and keys try and get a set with the code card or at least the code. One set I bought defo asked for the code when I first fired power into it.
Can I ask one thing .... All these looms use can bus i.e. multiple signals for one wire. I presume this means the ECU controls these impulses , so is there a special type of core wire these leads need or could you home build your own loom , with std automotive cable. Sorry laymans terms here I'm afraid.
Uh I can reply to that Peter. In short wire is wire. Think about cam bus looms as network cables with power (POE in IT). Your internet brings loads of differnet signals in. As long as devices on both ends know what the signal means and it arrives from place it should (ie loom) all will be good. Yes you could build one it is a case of using proepr grade cable so signal does not degrade as one wire will carry signal for numbre of functons and degradation could cause it to not be recognised on the other end. It does open pitential to very small rae looms as you could send quite a few differnet signals using one wire.
I need to add that to do minimalistic loom you would also need to re-program ECU certain pins on ECU will expect only selected signals to arrive, rest will be ignored or taken as error. But if you could reprogram ECU to add functions to pins you could pottentially have a wire going to dash and just splits to injectors, sensors, fuel pump and igniters
Yes, it is MADASL doing the build for me. As for cost vs benefit, the loom cost me £69 and I think the dash is going to go for less than 50. However it won't come with any immobiliser code so I will need to find some one to fix that. To be honest, I thought the immobiliser would be coded to the ECU like the 749 is. Regardless, even if it doesn't work it won't have cost me too much.
Thanks chrisw, I sent them an email. I'll be interested to see how this turns out. I'm not really going to get any benefit from doing the change other than a superficial one. If anything the original clocks are probably slightly more functional. I will be doing everything I can to this 749 to make it feel special to me. I love the 749 ad 999 shape, I just want to make it a really eye-catching one. I've already decided I will just spend the difference (and a bit more) between the purchase price of the bike I will be taking on and the 749R that's still up on eBay on fancy things rather than just buy a 749R (or even an MV F3.) I'm not too fussed about having a 749R engine, especially as the engine fitted to the coming bike has done 26k. I think I will enjoy it for a season and then maybe stick a bigger lump in after that, or get a full rebuild and have it like new. The clocks are just for an interest element.
That's what I am trying to ascertain here. I was getting the understanding that it probably won't be that hard? The hard part will be the ECU making things run nicely, but I will be getting it custom mapped regardless, so it should be as simple as flashing the 848 software and adjusting the timing etc to suit the 749 engine?
Both the 749/999 and 848/1098/1198 variants use CANBUS 749/999 The following signals are exchanged between the instrument panel and the ECU over the CAN line: – Motorcycle speed (input to engine ECU) – Idling (input to engine ECU) – Engine oil pressure (input to engine ECU) – Coolant temperature (input to engine ECU) – Lubricant temperature (input to engine ECU) – Starter motor actuation (starter button) (input to engine ECU) – First level diagnostics generated by ECU – Engine rpm (input to engine ECU) – Scheduled service limit (instrument panel LED lights up) – Intake air temperature (input to instrument panel) – Battery voltage – Motorcycle model identification – EOBD led control – Immobilizer recovery – Atmospheric pressure (sensor integrated in the instrument panel) 848/1098/1198 The signals exchanged over the CAN line between instrument panel and engine ECU are as follows: - Motorcycle speed (input to engine ECU) - Neutral selected (input to engine ECU) - Engine oil pressure (input to engine ECU) - Coolant temperature (input to engine ECU) - Oil temperature (input to engine ECU) - Starter motor actuation (starter button) (input to engine ECU) - First level diagnostics code generated by the ECU - Engine oil pressure (input to engine ECU) - Scheduled service limit (light on instrument panel illuminates) - Intake air temperature (input to instrument panel) - Battery voltage - Motorcycle model identification - EOBD light control - Immobilizer recovery - Atmospheric pressure (sensor integrated in the instrument panel)
The 848/1098/1198 ECU also controls the Idle Stepper Motor and EXBV which is not present on the 749/999 ECU
So it's not a problem? I know you re-flash ECUs, is it something you think you would have trouble with?
If you use the 749 ECU it shouldn't be a problem. If you use an ECU from an 848/1098/1198 then EXBV and ICV can be disabled so you don't get EOBD errors on the dash. The only other thing is the immo initiation signal from the 848/1098/1198 dash may differ from the 749/999 dash. This would be if using the 749 ECU. Depending on ECU then an IAW59M should work with immo disabled and an IAW5AM can be virginised. Make sure you post everything about your project
chrisw: If the dash and ECU are looking for model identification will the bike refuse to start if they don't match? Will the ECU need to think it is an 848 to match the dash? Edit: Good spelling
