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Diagnostics/ECU connection

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#21 · (Edited)
When you turn on the ignition the ECU will move the stepper fully one way, then reverse it to what it thinks is the initial position.
If it doesn't move, or doesn't move freely, it's stuck, so remove it and take it apart. The barrel should slip off easily. If it's sticky, clean the piston and barrel to free it up. If the barrel doesn't slip of easily, don't pull it off too hard without supporting the plunger or you might pull the plunger out of the base and strip the treads.
 
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Discussion starter · #22 ·
Well, I took off the air cleaner assy and turned on ignition. I could hear the stepper working, but no plunger or butterfly movement. I then took it off and the piston came out easily. Then re-connected the power lead and turned on ignition, this time the motor unscrewed the piston all the way and it popped off in to my hand ! I Screwed it back in and tried a few times. Each time it unscrewed, but didn't screw back in ! Think this may be the problem, or could it possibly be the throttle positioning sensor on the end of the butterfly shaft telling it a wrong reading ? Or other ? What do you think ? I'm hoping this is it, but would this explain why it's not letting any fuel through anymore, but initially did when it ticked over ? :confused:
 
#24 ·
Sounds like the stepper is goosed. It would do no harm to reset the TPS but to do that you need to get TuneECU working. Still like to test the cable on my XP laptop though. Did you get any drivers with the cable?
 
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Discussion starter · #25 ·
No the driver went after he delivered it. lol. I'm not that clued up on drivers & such, but I guess it's the bit that makes Windows work with new software. (sorry for being thick). The cable came with a cd which all seemed to work ok, but would not seem to upload to PC - could only run the program off the disc. Maybe that was the driver issue ? Anyway, that's why I followed a link off here and downloaded it all from there. I get the screen and everything looks normal, but surely if a driver was needed it wouldn't have appeared and would have said a driver is needed ?

Surely if the tps would have to be way out for the stepper plunger not to return at all ? Way beyond perameters I would have thought. Also, it initially ticked over ok for a while, but could have been on it's way out I guess. Hmmmm, I agree with you Laurence that the Stepper looks kaput, but not 100% as yet. Still mysterious behaviour :confused:
 
Discussion starter · #26 ·
Just found I have some water droplets in the Fuel rail, so does anyone know if this could block the injectors and cause non starting ?

Also, I have a Car OBD2 code reader and just noticed that you can get leads to go to a USB port, so i'm wondering if anyone knows that if I connect this to my Maniac Motors lead, it will read the fault codes, just like a Car ?

Had another look at my Stepper too and it's still just coming out when ignition is turned on. I have to screw the plunger back in to reset it. Anyone know of a fault that would cause this ? It doesn't look like it's had a lot of use, so not 100% convinced it's Nackered. :confused:

Any help gratefully accepted. Many thanks to Laurence for his on going help and also to Bikerdar for helping me source some clocks. A very helpful lot, you Nellie riders. I would be lost without this forum. Keep up the good work Guys. :clap:
 
#27 ·
Pauly said:
Had another look at my Stepper too and it's still just coming out when ignition is turned on. I have to screw the plunger back in to reset it. Anyone know of a fault that would cause this ? It doesn't look like it's had a lot of use, so not 100% convinced it's Nackered.
Click to expand...
When switched on, the stepper should wind IN first (to the stop) then step out a fixed distance. For some reason yours is only going one way, which is quite strange behaviour for a stepper. If one winding was broken, it wouldn't move at all. Without looking at it, I can't say exactly what is wrong. Your best bet is to connect up a known good one and see how that operates.
 
#28 · (Edited)
Are you ensuring you are running Tune Ecu from the harddrive, id: C:tuneecu.exe instead of c:desktop/tuneecu.exe ?
Mine wont connect unless it is ran from C: directly.

Also check that the usb to obd2 lead shield is actually running a ground from your pc to the bike....mine wasnt and it caused me issues also.

Another issue I had is one of the wires on the ecu connector lead had broken when removing the lead. Easily solved, but annoying as it was held n place by the rubber grommet and wasnt an obvious break.

On the stepper, holding it in your hand without the bolts holding the case together will only ensure it screws itself the whole way out as iirc, mine would screw itself out(closed) far more steps than in necessary to ensure it is fully closed, and then back a known amount of steps to its open position. If you have it in your hand, it will just run itself apart as it runs further to set itself closed than there are threads on the rod(it slips when assembled).

This is opposite to how Engenia describes his for some reason. I have an RS.

Its worth checking the other easy things like the relays and tip over switch also.
 
#29 ·
Pauly said:
No the driver went after he delivered it. lol. I'm not that clued up on drivers & such, but I guess it's the bit that makes Windows work with new software. (sorry for being thick). The cable came with a cd which all seemed to work ok, but would not seem to upload to PC - could only run the program off the disc. Maybe that was the driver issue ? Anyway, that's why I followed a link off here and downloaded it all from there. I get the screen and everything looks normal, but surely if a driver was needed it wouldn't have appeared and would have said a driver is needed ?
Click to expand...
The software on the disk is the tuneecu.exe ?
Double click your computer icon on your desktop, double click "C" and copy that tuneecu.exe file to there. Then ALWAYS run it from there.

EDIT: removed other info as just noticed this is the Trek forum :(
 
Discussion starter · #30 ·
Just an update on my Trek problems. I made sure the Tune ECU was directly from C drive and downloaded the FTDI driver. Now I have the Benelli dash and it all looks like it should work, but alas, the same problem. I'm getting the usb lights to flash and the Laptop recognises that there is a lead there, but cannot connect still. Hope my ECU is not Fried :doh:

I have ordered a Serial port plug to try just in case that makes a difference.

Thanks for the input James. I'm not using an OBD2 as I cant find a lead anywhere or even a Female OBD2 to make one myself. All my wiring and relays etc look ok too.

I have also ordered another Throttle stepper, so will try the Bike when that comes and as I have cleaned out the water from the fuel rail and re-checked i'm getting a spark, i'm expecting it to fire up in to life ! I can dream can't I ? Then sort out the Tune ECU when I know the ECU works ok - big if !:confused:

I guess if it still doesn't work I need to check my lead and also try another fuel pump/filter assy, so may take up Laurence's very kind offer to test my lead & borrow his spare pump assy if that's ok. :bow: But i'm still hoping I can sort it before it gets to that stage.
 
#33 ·
just one idea, if you try to connest tune ECU with Bike wicht Connection do you use? usb or Serial? because the drivers give the cable a fix com port
may be you have to switch the connection port before you connect the ECU.

May be i can help with a remot connection, if you got a couple of minutes
this week we can try this.
Plz give me a call or a mail if u want

ciao Alex
 
Discussion starter · #34 ·
Hi Alex. I have a usb lead and tried all my ports. Will try the serial when I get the adaptor.

Yes, i'll give you a call in the week & see if you find anything. Many thanks :clap:
 
#36 ·
you dont need an adapter, plz try to put in the usb connector
than choose under options - connection plz select serial and see wich comm ports are offerd normaly it is the last one, choose it.
than try to get connection

ciao ALex
 
Discussion starter · #37 ·
I thought the serial port was the 10 pin one at the back of laptops, as it gave the serial as an option, I thought it meant that. I'm sure I tried selecting all the serial and every other configuration I could think of.
No, didn't use the 2 pin loop. Think that's only for programming, but I did try it just in case. Tried with battery at various charges, but 12.5 volts was lowest. I'm running windows XP .net framework 3.5 svc pack 1. I also tried downloading the one from the forum links which I think was the 2.0. still no joy.
 
#38 ·
Yes serial is usualy the 10 Pin but in Case of this cabel the drivers name that as a com Port, dont ask me why i´m a mechanic not a bit&bite shaker,

dont connect the 2 pin connestor it is only for programming
 
#39 ·
you don´t need to try the 2 pin connector you only need it if you want to upload a map. ;)

which cable set do you have the usb -->AMP or the USB -->rs232 -->AMP?

Install this driver:
http://www.ftdichip.com/Drivers/CDM/CDM%202.08.28%20WHQL%20Certified.zip

go to the windows device manager and have a look at which com port the cable set has. Open TuneEcu click options/interface/serial and choose one of the ports after that egnition on wait 2 seconds now click ECU/connect.

If it doesn´t work ignition off then TuneEcu -->ECU/disconnect.
click options/interface/serial again and choose the next com port!
Ignition on, wait 2 seconds now TuneEcu click ECU/connect.

try this way with all listed com ports till you get a connection. If possible connect a battery charger to your battery while you trying to get a connection its only to get sure this isn´t the problem!
If nothing works you have to allocate the com port manually within the windows settings! In most cases it will work with com1! ;)
 
Discussion starter · #40 ·
Think I have the USB -->rs232 cable.

Thanks for the driver. Will have a look tomorrow or Monday & do as you describe, with the charger on. Fingers crossed, I just have the wrong driver or port. :bow:
 
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