I was going to make my own thread by seeing as there is so much information on this thread I might as well post it here to keep all the information in one location.
I just want to start by thanking TheGeek (Chuckster) on all his help whether he knows it or not. A lot of the threads Ive been through, to which TheGeek has responded to, has helped me narrow my issue down. Hopefully you can help resolve my issue as I am stuck.
Some quick info, I have a 2007 GSXR 750 that has been sitting for about 4 years, sat so much the gas tank had rust in it. I finally got it all running but I have the C28 and C22 error code. I have not gone through the C22 code just yet. I hoping I just need to replace the sensor. I don't think these 2 codes have anything to do with each other but someone may know otherwise.
So I have a GSXR 750 with the infamous C28 STVA error. I went through all the steps but I am not sure what is wrong. I started off by checking the resistance on the ECU connector, pins 1,18 and 2,19 both sets read 8.6 ohms. I know ideally it should real 7.0 ohms but I have a harborfreight multimeter which may be causing the discrepancy. Next I checked the STVA resistance and that also reads 8.6 ohms.
Next I checked the resistance from the ECU connector to the STVA connector plug which should read 0.3 ohms. So the resistance from pin 1 to 1 and on 18 to 18 read 1.4 ohms. But here is where I ran into an issue. When I checked pins 2 to 2 I didn't get a read out but for some reason pin 2 on the ecu connector to pin 19 on the stva connector I received a 1.4 ohms. And also pin 19 on the ECU against pin 2 on the STVA. I am not sure why this is happening. I highly doubt anyone has swapped the wires although I cannot confirm this. Sorry if this is confusing hopefully the video will help.
Additionally just to rule out the ECU, I took my 750 ecu and put it on buddy's 600. I know its not the same but that is all I have available to me. I ran his bike for about 3 minutes with my ecu on it and the F1 code did not come up. Im not sure if I should have run the bike for long or if a 750 ecu on a 600 would even work for this. I also took his 600 ecu and put it on my 750 bike and the F1 code was still there. I am kind of hoping its a wire harness issue since the ECUs are outrageously expensive and hard to come by for this year (WHY?).
Here is a video of my test which may help to better show my issue.
Thanks in advance