Electric Motion 2019 Trial – Bike Won’t Start

[ManuMotion]

Hey Guys,

In the past few days, my Electric Motion Trial has occasionally cut the throttle while riding. Now it doesn’t work at all. The kill switch still lights up, but there is no startup sound and the map switch doesn’t light up anymore. The battery provides about 50V and the battery relay clicks as expected. I also tried bypassing the kill switch, but it didn’t help.

thanks!

[konrad]

Based on your prior description, I assumed you had the 2019 model year.  That is the first year EM used the siliXcon controller. The wiring diagram will be very similar to the Epure bikes: https://www.electricmotiontech.com/home/em-epure-race/wiring-diagram

No startup tones would seem to indicate the controller is not being enabled.

Did you bypass your "Security Magnet" (kill switch) as I describe here: https://www.electricmotiontech.com/home/em-epure-race/wiring-diagram#h.fogcawtque8h

[ManuMotion]

27 minutes ago, konrad said:

Based on your prior description, I assumed you had the 2019 model year.  That is the first year EM used the siliXcon controller. The wiring diagram will be very similar to the Epure bikes: https://www.electricmotiontech.com/home/em-epure-race/wiring-diagram

No startup tones would seem to indicate the controller is not being enabled.

Did you bypass your "Security Magnet" (kill switch) as I describe here: https://www.electricmotiontech.com/home/em-epure-race/wiring-diagram#h.fogcawtque8h

Yes, it already has the Silixcon controller. I also bypassed the kill switch following your very good instructions, but unfortunately without success.

[konrad]

It's possible there is a fault in your wiring harness and the enable signal is not making its way back to the controller.  

There's good documentation here: https://docs.silixcon.com/docs/hw/esc/sc1/Wiring and here: https://docs.silixcon.com/docs/hw/esc/sc1/IO

Bear in mind that the EM controller does not use the flip-flop function for enable.  There must be constant battery voltage on the controller's "POWER" input to allow it to operate. 

Be mindful that there is a non-replaceable fuse inside the controller.  Don't short the "KEY" pin to ground (that's why an external resistor is recommended for current limiting).

[ManuMotion]

16 hours ago, konrad said:

It's possible there is a fault in your wiring harness and the enable signal is not making its way back to the controller.  

There's good documentation here: https://docs.silixcon.com/docs/hw/esc/sc1/Wiring and here: https://docs.silixcon.com/docs/hw/esc/sc1/IO

Bear in mind that the EM controller does not use the flip-flop function for enable.  There must be constant battery voltage on the controller's "POWER" input to allow it to operate. 

Be mindful that there is a non-replaceable fuse inside the controller.  Don't short the "KEY" pin to ground (that's why an external resistor is recommended for current limiting).

I’ve checked all the cables and they should be fine. To be honest, based on your links I don’t really know what exactly I should measure or how... do you maybe have any tips?

[konrad]

As much as I'd like to help, it has never been my intention to give detailed troubleshooting instructions.  There are a variety of reasons for this. 

You will probably need to fabricate the JST JWPF pick-off connectors described on my website.

My advice is to find someone local who can assist you or perform the work.