Throwing off STVA &STPS when removing EXCVA - Suzuki GSX-R Motorcycle Forums Gixxer.com
 
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post #1 of 11 (permalink) Old 09-21-2018, 04:12 AM Thread Starter
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Throwing off STVA &STPS when removing EXCVA

I removed my excva recently an was OK for a little bit then it threw off my STPS & STVA by opening the sensor ground wire. I found this by using a multimeter audible continuity test. So I did assembled the excva casing and wrapped it in electrical tape and spray adhesive (can cut with razor but helps with heat flux) spray adhesive only the outside tape after taping. I did this for weight reduction. Haha now I am going to test the voltage and resistence of the stps and stva. Stps was putting out over 5 before. The stva is opening up too much an fluttering an then some times won't let me over 3-8 rpm. I'm gonna check the two sensors in the morning. If all is well adjust the stps and home for the best. Please feed back is all appreciated
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post #2 of 11 (permalink) Old 09-21-2018, 07:39 AM
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Re: Throwing off STVA &STPS when removing EXCVA

First, the EXVA and STVA are similar, but completely unrelated systems. If you did the EXVA removal properly, it shouldn't have done anything to the STVA system. I think you're not giving us the whole story here... Did you ever remove the STVA or STPS?
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post #3 of 11 (permalink) Old 09-21-2018, 08:17 AM Thread Starter
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I looked it up on my service manual it shows them all being chained together by the same ground. And I tested it. So I'm not sure why I would be wrong.
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post #4 of 11 (permalink) Old 09-21-2018, 08:19 AM Thread Starter
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I haven't even touched the stva at all and I haven't done anything but test the resistence and continuity on the stps. When the excva was disconnected the b/br wire to it'd terminal didn't have continuity. After plugging in my way. It did.
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post #5 of 11 (permalink) Old 09-21-2018, 08:21 AM Thread Starter
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My phone keeps adding a c in EXVA I'm not sure why.
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post #6 of 11 (permalink) Old 09-21-2018, 08:25 AM Thread Starter
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And I followed yoshimura's step by step on removing the EXVA
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post #7 of 11 (permalink) Old 09-23-2018, 06:09 PM
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Re: Throwing off STVA &STPS when removing EXCVA

You've got busted ground then. Almost all the components share the same ground. Doesn't mean they're connected.
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post #8 of 11 (permalink) Old 09-23-2018, 11:24 PM Thread Starter
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Originally Posted by TheGeek View Post
You've got busted ground then. Almost all the components share the same ground. Doesn't mean they're connected.
I also accidentally unplugged both couplers from my ecu. Would that cause it to forget the STPS position?
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post #9 of 11 (permalink) Old 09-24-2018, 09:08 AM
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Re: Throwing off STVA &STPS when removing EXCVA

No, the sensor is analog.
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post #10 of 11 (permalink) Old 09-25-2018, 01:10 AM Thread Starter
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No, the sensor is analog.
So I figured out what the issue was. The yoshimura manual was wrong. It calls for you to remove the 5th pin from 34, which is a B/Br pin that is actually a sensor ground as well as the 6th pin from 34, I re grounded the manual called for and its a C-00 code now.
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post #11 of 11 (permalink) Old 09-25-2018, 01:16 AM Thread Starter
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No, the sensor is analog.
This is the manual
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