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Tech Help / 2017 zero SR - replacement mbb, no error codes but will not drive
« on: March 15, 2025, 02:24:12 AM »
Hi there, i have a 2017 zero sr, about a year ago i had some water ingress in one of the mbb connectors, it caused isolation faults and all sorts! when i finaly got to it, i had noticed it had corroded one of the pins and it actualy snapped on when i inspected it.
i have let it sit for a while, and recently decided to attempt fixing it, i ordered a new MBB, and plugged her in, she came to life, dash came on lights come on, i thought Weeyy it lives!! no error codes or anything but.. to my dissapointment when put the kill switch in the run and put the side stand up and twist the throttle, i get absolutely nothing, dosent move!! XD
now the kickstand is comfirmed to be broken, but before any of this i was aware of that, its failed in some sort of Always up mode?
cheaking logs dosent show anything either, unless im missing somthing its litterly completely happy with life, so happy it seems to be stuck in a "nah mate i dont actualy feel like moving" mode? XD
i was worried there was a break in one of the wires going to the mbb as if i moved it to much one way i would get error 61 on the dash untill i turned it off and on, but appon cheaking the logs i can actually see that my suspicion near the end was comfirmed that it would seem that code 61 actually means tip sensor was triggered.. So i took a deep breath feeling a little happier.
but thats about where im up to. i have a bike that is perfectly happy with everything but dosent actualy want to drive at the same time.
i can comfirm the contactor closes, and you get the green circle showing shes live and ready to drive, i can also comfirm when i roll forward of backword i get the white noise from the motor, (if this info helps?)
i can also comfirm that the throttle is fully functional, it got replaced once a few years ago when i dropped it and i have done the tests i did then to comfirm it as broken assming maybe the throttle went again even though i didnt drop it, but its perfectly fine, also the mbb/sevcon seems to be tottaly aware the throttle is there and functional as if i hold the throttle slightly on and flip killswitch to go, i get error 1 (high throttle fault) then if i let go it goes away, this is expected behaivour to stop you flying of when you didnt mean to, this helped me figure out i had a throttle fault when i replaced it years ago and led me to also see the sevcon was showing a flashing pattern light which with googling helped me figure out it was indeed the throttle, so i replaced it! anyway i digress.. getting a little of topic there.
so all i have to go on, is maybe the kickstand switch has failed more in some strange way that hasnt sent anything to be logged in the logs, but at the same time is stopping it from moving?
im at a complete loss for what to think to be honest! i dont want to keep throwing money at this bike if its not going to fix it you know?
any ideas would be extreamly welcomed!
i have let it sit for a while, and recently decided to attempt fixing it, i ordered a new MBB, and plugged her in, she came to life, dash came on lights come on, i thought Weeyy it lives!! no error codes or anything but.. to my dissapointment when put the kill switch in the run and put the side stand up and twist the throttle, i get absolutely nothing, dosent move!! XD
now the kickstand is comfirmed to be broken, but before any of this i was aware of that, its failed in some sort of Always up mode?
cheaking logs dosent show anything either, unless im missing somthing its litterly completely happy with life, so happy it seems to be stuck in a "nah mate i dont actualy feel like moving" mode? XD
i was worried there was a break in one of the wires going to the mbb as if i moved it to much one way i would get error 61 on the dash untill i turned it off and on, but appon cheaking the logs i can actually see that my suspicion near the end was comfirmed that it would seem that code 61 actually means tip sensor was triggered.. So i took a deep breath feeling a little happier.
but thats about where im up to. i have a bike that is perfectly happy with everything but dosent actualy want to drive at the same time.
i can comfirm the contactor closes, and you get the green circle showing shes live and ready to drive, i can also comfirm when i roll forward of backword i get the white noise from the motor, (if this info helps?)
i can also comfirm that the throttle is fully functional, it got replaced once a few years ago when i dropped it and i have done the tests i did then to comfirm it as broken assming maybe the throttle went again even though i didnt drop it, but its perfectly fine, also the mbb/sevcon seems to be tottaly aware the throttle is there and functional as if i hold the throttle slightly on and flip killswitch to go, i get error 1 (high throttle fault) then if i let go it goes away, this is expected behaivour to stop you flying of when you didnt mean to, this helped me figure out i had a throttle fault when i replaced it years ago and led me to also see the sevcon was showing a flashing pattern light which with googling helped me figure out it was indeed the throttle, so i replaced it! anyway i digress.. getting a little of topic there.
so all i have to go on, is maybe the kickstand switch has failed more in some strange way that hasnt sent anything to be logged in the logs, but at the same time is stopping it from moving?
im at a complete loss for what to think to be honest! i dont want to keep throwing money at this bike if its not going to fix it you know?
any ideas would be extreamly welcomed!