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K7 with TPS issues please help....

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Discussion starter · #21 ·
Also when I crack the throttle quickly and release it the tps doesn’t respond on the screen. The line just stays in the middle. So once the new tps is installed I’ll post the results. Hopefully this info will help anyone in the future...
 
#24 · (Edited)
Either I'm missing something or you're not looking hard enough. Here's one for $122 with software. AFAIK you need at least software version 19 and the last time I checked they were shipping version 28. Their mention of "Support Year: 2000-2012" sounds like v28. I have v19 but am looking for someone to send me a copy of a later version. So get going!

SDS originally cost around $700 so I don't understand how it's gotten so cheap. The pics they use look like the real thing. Some other listings are less than $100. But I see "Brand Name: MAOZUA" which makes me nervous. Buyer beware and ask questions.

P.S. Here's one with "SUZUKI" across the top of the label, which the genuine item had. Notice the crease in the cardboard box. They're all using the same image. Go figure.

P.P.S. This thread may be of interest.
 
#25 ·
ddl750 said:
With the engine is off there’s also a delay. If the delay wasn’t 4 to 5 seconds long I wouldn’t be concerned. But my thinking of when the throttle is twisted. It pulls on the cables that move the linkage that runs through the throttle bodies and connects to the tps. The tps then sends that info back to the ecu. The ecu then tells the injectors more fuel is needed. So with that in mind when I’m completely off the throttle my injectors may be sending fuel into the cylinders when it’s not needed. Which could be the reason my plugs were fouled... just my thoughts...
Click to expand...
Your thought is a bit simplified, but essentially quite plausible. I was wondering how this delay may be caused. One way would be for something to actually delay closing the throttle, which might be due to the throttle sticking at some point from the grip to the throttle body, or because the secondary throttles keep the primaries open. The latter is unlikely if it also happens with a stopped engine, but, in any case, you should be able to see if that's happening by looking at the left side of the throttle body, from outside, looking between the tank and frame, or by lifting the tank. If the drum/pulley, where the throttle cables attach shuts immediately and the dash follows 4-5sec later with no further motion, it's not that.

If it isn't, I find it hard to imagine that it could be the TPS itself, as its a simple potentiometer, which can't introduce a delay in its reading in a straightforward way. Bill, can you confirm that the dash responds in less than a second in your case? I'm pretty sure it took significantly longer for me, but it's been a while; I'll have to recheck.
 
#28 ·
Your link appears to be for their cars and not their bikes. The bike SDS is 09904-41010 (printed on the label) and the software is 99565-01010-xxx (xxx is version number). I'm unaware of an updated pn for either. There also was a boat version of SDS. Maybe the hardware is the same and just has different cables but I don't know.
 
#30 ·
I re-checked the response on my K4 with a warm, running motor, to make sure the STVA wouldn't interfere. To measure the response time, I held the throttle manually open a bit, until the dash registered high for a couple of seconds, then let go and started counting. To make sure there wasn't drag delaying the throttle's return, however slightly, I also tried closing it shut forcefully. I made several attempts and each time the response seemed to be different. When closing forcefully, it seemed to respond slightly faster on average, but still, it could take from somewhat under a second, to almost three seconds. I counted mentally, as I didn't have a timer at hand, so perhaps these times are a bit over- or underestimated, but I wouldn't think by much and some tries certainly tool substantially longer than others.

One guess would be, that the 0.4s figure concerns the display update only, and the update of the dash from the TPS is done at a slower rate, say every 1s, so that the dash will update every 1-1.4s, which would explain the variable update times (assuming I overstimated the "almost three seconds" above by a lot). Another is that something is interfering with the reading of the TPS (some stray capacitance perhaps, introduced from God knows what, smearing out the reading), which might also explaing why I've always felt the off throttle response to be, not only somewhat jerky, but variably so, i.e. better on some days and worse on others.
 
#32 ·
Not sure if your problem is this simple (or even if this is what you're describing), but something that had me (momentarily) confused when I first bought my bike from the previous owner was that when I would open my throttle fully and then release it by letting my hand go/taking it off the bar, the engine revs would "stick" and stay open for a half second or so, before dropping. I obviously didn't notice this if I had my hand still on the throttle, as the muscle action of turning the throttle off would fix it.

The fix was simple - the bar end on the throttle side was too tight and stopping the throttle grip from instantly retracting like it should have. Instead it slowly retracted. Loosened the bar end slightly and instantly fixed.
 
#35 ·
Don't understand. Updating is just the software, which is on CD.

Someone here bought one a year or two ago. Worked fine AFAIK. But the search function has been screwed up such that I can't find his posts.
 
Discussion starter · #37 ·
Here’s the reply I received after Inquiring if the part was a genuine Suzuki SDS or a copy. “Hello sir, good day!
this item is not original, it's made in China, in China marketing, this tool all are the same.
Operating System: Windows XP, Vista and 7
Support Year: 2000-2012
Notice: SDS Cannot Be Updated.

pls check the attachment picture see support mode and system.
any questions, pls contact us feel freely.
greetings
Linda
 
#39 ·
Something may be being lost in translation. She might be referring to updating to SDS-II. I'd be inclined to ask if the supplied CD is different than the Suzuki product or if the Suzuki software will operate their product or if they could send you a copy of the operating manual.
 
Discussion starter · #40 ·
Ok so I installed the new tps and did see some improvement. Now I’m seeing the line move to the top position 2-3 seconds after I twist the throttle. But unfortunately last nite whiIe I was out riding the bike had another C40 code. Then while I down shifting hard into 2nd gear the bike stalled. But it starts right back up with no issues. So on the way home I wanted to see if I could get the C40 code to come up again. So as I entered the off ramp I stayed in the throttle and started down shifting from 5th all the way down to 2nd gear quickly. And it threw another C40 code and stalked. This morning I conducted more tests of the TPS, STP and STV all sensor test fine according to the repair manual. So now I’m gonna purchase the SDS tool and reset the ISC Valve and get it to relearn. Also I’m gonna resync the throttle bodies. I’ve checked and tested everything I can think of so I hope once the ISC Is reset and learns the new setup it’ll finally fix the issue! Here’s what I’ve done so far: new plugs, fuel injectors cleaned and flow tested, new clutch switch, new ISC Valve and new TPS. Thanks for all the advise guys
 
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ddl750
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