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Old 11-14-2012, 06:34 PM   #1 (permalink)
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Is my TPS and ISCV set right? Video - TuneECU

This is the mechanical result of running through the "Adjust ISCV" option in the program. This is mainly to verify that the resulting mechanical operation is correct after swapping my throttle body assembly.


First I made sure the TPS was set properly at .60 with the arm resting on the adjuster screw.


I also made sure there was .5mm clearance between the arm and the roller before I started.

The I started "Adjust ISCV" in the tests page. This asked to verify voltage of TPS, which was true at .60v. This is what was also reported in the diagnostics page.

Then i checked clearance and it was still a good .5mm

Then I double clicked on "Adjust ISCV" and the voltage rose to .75. It toggled back and forth, the arm, between .60 and .75. I then double clicked "Adjust ISCV" again.

Then 15 seconds later all was done however the arm never came to rest on the screw. It rests slightly above the screw here.

When I run the process again it backs off. Perhaps it's slightly elevated when cold and settles down when warm? That is the only thing I can think of. Just wanted to check


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Last edited by Moogs; 11-14-2012 at 06:44 PM.
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Old 11-16-2012, 05:36 AM   #2 (permalink)
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You got it spot on.
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Old 11-16-2012, 09:35 AM   #3 (permalink)
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Quote:
Originally Posted by Moogs View Post
....however the arm never came to rest on the screw. It rests slightly above the screw here.
It's not supposed to. With ignition on the stepper holds the throttles slightly open for starting and with the engine running it adjusts to maintain idle speed. The only time the arm rests on the screw is with the ignition off or the first click of "Adjust ISCV" in TuneECU.
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Old 11-16-2012, 10:43 AM   #4 (permalink)
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Seems to me that the video ought to be incorporated into Champ's most excellent tutorial.
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Old 11-16-2012, 11:53 AM   #5 (permalink)
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I thought same - with kind permission of both I will put it there?
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Old 11-16-2012, 12:08 PM   #6 (permalink)
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I thought same - with kind permission of both I will put it there?
No problem from me - but then it's not my video.
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Old 11-16-2012, 04:32 PM   #7 (permalink)
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You guys can do whatever you like. Bike runs really well now. I am just the kind of guy that needs to see things sometimes. The manual didn't explain this part very well. Thank you for the write up Champ. It really helped a lot.

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Old 11-16-2012, 05:13 PM   #8 (permalink)
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Quote:
Originally Posted by oldndumb View Post
Seems to me that the video ought to be incorporated into Champ's most excellent tutorial.
For those who haven't come across the tutorial it's located in the ECM and FI Tuning forum as a sticky titled TuneECU TPS and ISC Stepper Adjustment. It's been there a while and now it's supplemented with moogs video to help you visuallize what's going on.

The write up was based on my 1050 Sprint so it's good for Keihin equipped Speed Triples as well. A shameless plug for my own post but hey, I put a lot of work into it so if more folks benefit the more it was worth it.
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Old 01-26-2014, 09:00 PM   #9 (permalink)
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Thread Revival Time!!!

I think I may have made an error in ISCV Reset procedure.

I read Champ87's write several times before doing it but sometimes I miss things!

It all started when I notice my standing TPS voltage was .67V. So I decided to tear the bike apart and reset it.

This is what I did:

1) Removed tank, air box and throttle bodies from intake manifold

2) Jumpered battery power, turned on my key.

3) Adjusted TPS to .6V

4) Adjusted ISCV Arm to .5mm

5) I ran the Set ISCV in Tune ECU. But I failed to recheck the arm clearance after it as done and put it all back together again.

6) Reset Adaptation when it was all put back together

Now the bike seems to idle low?!?!?

About 1000RPM at initial startup while totally cold and it creeps up to about 1400 or 1500. Always shot right up to 1800ish before.

As the temp increases to full running temp the idle drops down to around 1000. If I hit the throttle a few times it seems the ECU pushes the idle back up to 1200 to 1300. If I shut off the bike and wait 30 seconds and turn it back on without hitting the throttle in muddles along at 1000rpm.

My TPS still reads .6V but could the Idle Arm be so far out of adjustment it's not assisting with cold start and normal idle?

Or is my bike still "learning" post adaptation reset and I just need to give it more run time? I have only ridden it about 15 miles since my hack job ISCV reset was attempted

Thanks
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Old 01-27-2014, 03:15 PM   #10 (permalink)
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The procedure using TuneECU can be summed up in 3 simple steps:
  1. Double-click “Adjust ISCV?” to move throttles to fully closed position and check/set TPS Voltage to 0.60V.
  2. Double-click “Adjust ISCV” again to drive the stepper motor to the fully-open position. The TPS voltage should now be the previous reading plus 0.15V (0.75V +/-).
  3. Reset Adaption.

If that's what you did then it may need a bit longer to establish new adaptions. 15 miles should be enough but it's possible that the bike hasn't had enough time idling for the ECU to establish idle values. One easy thing you can do without removing the tank is to hook up TuneECU, use "Reset Adaption" to clear trim values then start it up and allow it to idle for a bit without touching the throttle. Idle may be a bit erratic at first but should stabilize after a while.

If that doesn't work then you need to go back through the check/adjust process again. Pay attention to my comments about moving the adjuster nut. The 0.5mm clearance should correspond with 0.75V TPS reading but if they don't then you must decide to set one or the other.
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