Hello all, I've been lurking all day but have decided to create an account and join the community. I was hoping I could get some insight into a problem with my scoot..
A few days ago I purchased 3 scooters for $390 from someone who was wanting to get rid of everything in a house before selling. He said that they had not been started in about 5+ years and they were sitting outside...
Surprisingly all of them were in really good shape (one even had 0 miles), one had never had gas in it, and started with a battery...the other just needed a carb rebuild and tank flush to get going...tonight I finally started working on the 2009 citycom 300i and it may have bested me!
The past couple of hours, I've been really impressed with this scooter, especially the build quality, and the shape its in. First, I took a brand new riding lawnmower battery (12v 300cca) and connected it, and to my surprise the gauge cluster lit up and all the instruments did their pre-start flashy "needle check"! I had a "what if" moment and decided to put some gas in it and give it a shot. Sadly, absolutely NOTHING happens when I hit the starter button. No click, no crank, no hum of the fuel pump. My girlfriend and I started the typical diagnostic procedure starting with the simple things. Kickstand up, kill switch in the run position ect. With ignition on, I can tap each brake and see the brake light get brighter (indicating good brake switches). Next, i broke out the power probe and multi meter and started checking all fuses, including the biggun on the starter relay. The kickstand switch also seems good.
I took a break to get some perspective and decided to do some googleing and that's where I found ya'll. I saw another thread about a non-starting issue and the fix turned out to be the fuel pump, and a second one the fuel pump relay. I downloaded the manual (amazing!) and attempted to do the checks for these. (the ones on 4-26)
It failed both checks. At least, I believe it did.
TL;DR There is no 12v at the fuel pump relay with ignition on...and the ohms was about 10x the test stated in the manual. But here is where I am stuck. What would cause this? I believe it has to go through all of the sensors/switches (which seem to test good) before getting to the ECU...and then the ECU decides to send 12v to the fuel pump relay... So how do I start narrowing down my suspects?
Another question, NONE of these relays have any kind of pinout markings on them like every other relay ive ever seen does..so im not exactly sure how to bench test them.
Any help, guidance, or information would be incredibly appreciated.
