fitter07ZX6R

I just purchased said bike with 8k mi. Its giving me code 62. It had what i would describe as a lopey idle or small lunging idle. When revved it did't go past 8k rpm. I drained fuel tank and put fresh 91 with the correct amount of sea foam also. I've done a little digging. Manual of course. Checked resistance on the sub-throttle actuator. Was at 6.1 on both sets of prongs. I don't have the peak voltage adapter to test the incoming voltage from the ecu though. So i put the bike back together thinking hoping it was just a bastard plug loose. Its worse than before . Any ideas?

09ZX-6R

voltage is low. it should be 8.5-10.5V DC. sound like you got a bad sub throttle sensor.

zx racer

i have a mint set of TB's with sub throttle sensor off a 07 zx6r i parted out for cheap if interested.

fitter07ZX6R

I didn't test the tps sensor for the sub-throttle itself for resistance. My idea is that the Actuator would still function but crazily in the sense of not knowing what to do without the sub-throttle tps sensor (09ZX-6R). It doesn't move at all and no funny noises like people explain.. Am i steering myself in the wrong direction with this assumption?

zx racer

here is a link to the post if you wanna see pics.

07-08 ZX-6R parts *cheap*

Street Hawk

I gotta know what the fix is on Fitters bike. So I can make note for future problems of my own.

Not to throw anyones mind off track, but Fitter I had a problem where I had an erratic idle as you described and wouldn't rev past 14,000rpm. It was my #4 coil.Resistance was lower in that one than the others.

fitter07ZX6R

Come to think of it. It does when holding the throttle to keep an idle of 2k it does cut out at times. thanks i'll check that out also.

Street Hawk

But you got a code. Different from mine, I never got a code on my bike. I'm leaning towards a sensor.

fitter07ZX6R

Would a bad sensor on the sub-throttle valve cause it to not work entirely?

fitter07ZX6R

Sensor tested just fine. The only thing now i can't test to point a finger at or eliminate would be the incoming voltage from the ECU

09ZX-6R

ok. since your somewhat new, and i can say that since you have almost no posts yet. And the fact that you dont quite understand what is happening and why. im not bashing by the way, take no offense.

first off, the sub throttle sensor is not a Sub throttle TPS as you called it. its simply a sub throttle sensor. period dot. when you refer to TPS your inadvertantly miss directing readers to think you have a Throttle position sensor. the TPS itself is the MAIN throttle sensor. not sub throttle sensor. hope that clears that up.

as far as how they function, when you turn on the bike, not starting it, just powering up the pump and accessories, the sub throttle sensor will cycle the upper butterfly open and close. if it isnt doing that then you have a sub throttle sensor issue. If it cycles, then you need to check it under load, IE. when the bike is running. The Sub throttle really doesnt do much till you get into the mid to upper range of the RPMs. Then they will open. They also act as your auto chock when you first start the bike cold. They will fluctuate to allow a bit more air to burn the fuel and then idle down. So, when you here the bike idle down when its warming up, thats the sub throttle sensor closing the upper flies. they dont do anything till your getting into the revs.

your TPS (main Throttle Position Sensor) is the lower set of flies. they do most of the work. They dont start till you crack the throttle. they are directly connected to the cable rotor that turns the sensor which in turn moves the flies. any time the throttle moves, the TPS moves.

Keep in mind, your TPS, and your sub throttle sensors are tied into the Servo motor. All three function together and the ECU reads resistance and load at each point. then the ECU will differenciate how much fuel to deliver in conjunction to the other sensors that are functioning as well. but they dont effect the TPS, STS, and Servo motor directly.

as for your issue, you need to check the STS under load and static. you need to know resistance, voltage, and what its getting from the other sensors in terms of input/output.

hope you can understand this. if not let me know. ill try to help you more. hard to do from here.

Street Hawk

FYI- I just read on Kawiforums that someone got this code from washing their bike. Somehow water got into somewhere and blew the TPS.

also found this:
Service Code Table
Service Code Problems
11 Main throttle sensor malfunction, wiring open or short
12 Inlet air pressure sensor malfunction, wiring open or short
13 Inlet air temperature sensor malfunction, wiring open or short
14 Water temperature sensor malfunction, wiring open or short
15 Atmospheric pressure sensor malfunction, wiring open or short
21 Crankshaft sensor malfunction, wiring open or short
23 Camshaft position sensor malfunction, wiring open or short
24 Speed sensor malfunction, wiring open or short
25 Gear position switch malfunction, wiring open or short
31 Vehicle-down sensor malfunction, wiring open or short
32 Subthrottle sensor malfunction, wiring open or short
33 Oxygen sensor #1 inactivation, wiring open or short (Equipped Models)
34 Exhaust butterfly valve actuator sensor malfunction, wiring open or short
35 Immobilizer amplifier malfunction
36 Blank Key detection
39 ECU communication error
51 Stick coil #1 malfunction, wiring open or short
52 Stick coil #2 malfunction, wiring open or short
53 Stick coil #3 malfunction, wiring open or short
54 Stick coil #4 malfunction, wiring open or short
56 Radiator fan relay malfunction, wiring open or short
62 Subthrottle valve actuator malfunction, wiring open or short
63 Exhaust butterfly valve actuator malfunction, wiring open or short
64 Air switching valve malfunction, wiring open or short
67 Oxygen sensor heater malfunction, wiring open or short (Equipped Models)
83 Oxygen Sensor #2 inactivation, wiring open or shout (Equipped Models)
94 Oxygen sensor #1 malfunction, wiring open or short (Equipped Models)
95 Oxygen sensor #2 malfunction, wiring open or short (Equipped Models)

fitter07ZX6R

09ZX-6R thanks for the help. I'm dead in the water with this. When you say check the STS your referring to the sub-throttle sensor..? I've checked the resistance on the sub-throttle sensor. Range is 4-6 ohms according to the book. It read a 5.3. I haven't checked the plug for anything coming to the sensor. I've haven't suspected the sensor just because its under code 32. And is the servo motor your referring to the servo for the exhaust butterfly?

09ZX-6R

STS = sub throttle sensor

servo motor = the servo under the seat that controls the butterfly in the exhaust pipe.

your ohms may be good. but your amps & volts may be bad. voltage and amps can change up or down but the Ohms can stay the same.

you can also try to clear the ECU and then remove the battery from the bike to reset everything. its in the service code section of the manual. tells you how to read it and how to clear it. i think the 07 has a permanent history in it tho. but if you can get to the dealer 2 mode then you can manually clear it. been a while since iv done that. but look into it.

theres other things you can try to. if the sensor is getting the right power in and out of the sensor, then the sensor may be stuck in a closed loop. meaning its always on and thinking its working when it isnt doin anything at all. try and get a sensor and swap it to see if it works. or keep on diagnosing it.

fitter07ZX6R

Thanks man. Great help!! I'll see what i can do in the morning.