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My16M starting Issues on Ducati 916 (Read 19971 times)
Indy40
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Re: My16M starting Issues on Ducati 916
Reply #15 - 06/13/11 at 19:49:43  
I finally check everything on Saturday and reload a clean map.
TPS at idle still at 64.
The bike starts well, runs perfectly on fast idle to get warm.
Some optimization to do on idle as it stalls, but everything in order.

I decide to take some time on Sunday to finalize the idle setting.
Contact On ... No fuel pump noise !
Undecided
I check the fuse, and the 15A master under the seat seems to have face a very hot period.
I change it ... nothing better.

I put in place the original MM1.6, and then it works ...
I will try to redo the basic testings of the board after its build, but it sounds not good at all ...
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Re: My16M starting Issues on Ducati 916
Reply #16 - 06/13/11 at 22:02:52  
The only components that can draw significant current are the spark FETs. Check them and the PCB in that area for any signs of heat.

I think I know what has gone wrong with your board as I've recently become aware of a weakness in the My16M MkIV design.

To test, put the ECU on the bike with the ignition OFF.
Check the voltage on the small surface mount FET nearest to the inductor L2. The tab of that FET should be at battery voltage as it should be off. If it is not that transistor has failed.

This transistor drives the ECU power relay so in fact the ECU is now permanently powered. That's the reason you don't hear the fuel pump, the ECU hasn't powered up. Its been up all the time. If you crank, it will probably start.

To fix the problem you will need to replace that small FET and in addition a small 0.1uf capacitor should be soldered across R9G, just below that FET, to prevent the problem occurring again.
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« Last Edit: 06/13/11 at 22:04:29 by YaBB Administrator »  
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Re: My16M starting Issues on Ducati 916
Reply #17 - 06/13/11 at 23:03:53  
If I've well understood, I've checked the voltage on the Q6 upper tab which is the closest from L2.
I've searched before for any signs of heat but no evidence.
Everything shut off, I find 13,20 V.
This transistor seems to be still alive, no ?

However, which voltage for the 0,1uf capacitor across the R9G ?
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« Last Edit: 06/13/11 at 23:59:09 by Indy40 »  
 
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Re: My16M starting Issues on Ducati 916
Reply #18 - 06/14/11 at 06:12:15  
Yes that sounds ok.
Just a standard monolithic cap like all the blue ones. They're typically rated 50V.

At any stage you can send the ECU to me and I'll sort it out.

The next thing to check are the voltages on the voltage regulator. 0V off and about 14V in and 5V out when on.

Does the ECU still communicate?

Check the operation of the small FET next to the one we just looked at. It drives the fuel pump relay. Do you see a 5V pulse on its gate for 2 seconds? Does its tab pull to 0V for that time?
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Re: My16M starting Issues on Ducati 916
Reply #19 - 06/15/11 at 05:54:25  
"At any stage you can send the ECU to me and I'll sort it out."
Thanks. I'll try to test everything before !  Smiley

"Does the ECU still communicate ?"
It doesn't seem. The Controller1.60b doesn't manage to complete an upload or a download ...

"The next thing to check are the voltages on the voltage regulator. 0V off and about 14V in and 5V out when on.
heck the operation of the small FET next to the one we just looked at. It drives the fuel pump relay. Do you see a 5V pulse on its gate for 2 seconds? Does its tab pull to 0V for that time? "
Some tests tonight after having reloaded the battery.
Contact OFF :
- small surface mount FET nearest to the inductor L2
   Base 13,55V / Gates from left to right : 0 / 13,55 / 0
- small FET next to the first one
   Base 0V / Gates from left to right : 0 / 0 / 0
- voltage regulator
   Base 0V / Gates from left to right : 0 / 0

Contact ON :
- small surface mount FET nearest to the inductor L2
   Base 0V / Gates from left to right : 6,6 / 0,01 / 0
- small FET next to the first one
   Base 13,14V / Gates from left to right : 0,003 / 13,14 / 0
   No signs of any 5V pulse (checked twice ...)
- voltage regulator
   Base 0V / Gates from left to right : 19 (?) / 5
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Re: My16M starting Issues on Ducati 916
Reply #20 - 06/15/11 at 08:01:20  
I think the lack of comms and 5V pulse means that the chip needs to be reflashed.

Do you want to give that a go?
Here is a link to the procedure.

http://www.cajinnovations.com/MyECU/FirmwareUpgrading.htm
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Re: My16M starting Issues on Ducati 916
Reply #21 - 06/15/11 at 08:20:31  
TDC=0x1600 means that TDC is 22 pulse after the missing one?
if i want to set the TDC for example 1 or 2 pulse after the missing pulse how i have to set?
thx
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Re: My16M starting Issues on Ducati 916
Reply #22 - 06/15/11 at 09:29:00  
You would set them to 0x0000, 0x0100, 0x0200, ...
Why would you want to do that? That is a ECU/bike configuration item, not a tuning item.
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Re: My16M starting Issues on Ducati 916
Reply #23 - 06/16/11 at 00:38:07  
because i have to put myecu not in a ducati or guzzi engine, and i have to set another pulse weels and another TDC position, 0x0100 at what pulse after the missing one is?
thx again
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Re: My16M starting Issues on Ducati 916
Reply #24 - 06/16/11 at 06:12:13  
YaBB Administrator wrote on 06/15/11 at 08:01:20:
I think the lack of comms and 5V pulse means that the chip needs to be reflashed.

Do you want to give that a go?
Here is a link to the procedure.

http://www.cajinnovations.com/MyECU/FirmwareUpgrading.htm


Thanks !
Why not, I think it's worth trying it ...
and it should be usefull in the future.
I need to buy the different parts needed for the cable and I'll tell you when I got everything as I will need the "hex" file I suppose ?
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Re: My16M starting Issues on Ducati 916
Reply #25 - 06/16/11 at 06:26:08  
Send me an email when you're ready and I'll send you the hex file.
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Re: My16M starting Issues on Ducati 916
Reply #26 - 07/10/11 at 07:00:56  
Hi,
Back on the forum ...
The FLASH operation seems to have work fine.
I've done some map comparisons before/after having loaded them into the ECU.
I've understood that InjDur should be a multiple of 16.
Is there such a rule for RPM or for SpkAdv as there are some minor differences between the 2 files when I get it from the ECU ?
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Re: My16M starting Issues on Ducati 916
Reply #27 - 07/10/11 at 07:30:44  
There's no simple rules for the rounding of the others.
The RPM is actually stored as a time period and spark advance depends on the ECU configuration.

The main thing is the difference will be small and only occur the once after hand editing.

It makes sense to upload the map after download and use that map as the basis of future maps.
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