Kenevo gen2 won't start. Looks like it's dead :(

[bubuthedog]

Hola,



A few months ago, my bike started having connection issues. It would randomly switch off during rides, but a little wiggle with the main motor-battery cable usually helped. Over time, the problem worsened—it began shutting off on every bigger bump. Then, after a crash, I stopped using it for a few months, and now it won’t turn on at all.


I took it to a Specialized authorized shop, but they told me the best option is to buy a new bike (the warranty has already expired). They said the cables are completely messed up. Unfortunately, I can’t afford a new bike right now, and living without riding just isn’t an option for me. I can replace cables but dont know which ones and all cables in total would be a big cost.

A friend of mine, who’s an electrician, offered to help and is currently checking every cable. He has one key question: What voltage should be coming from the TCU to the battery cable?

If anyone has a wiring diagram with voltage values, that would be a huge help. Thanks in advance!

 

[#lazy]

That shop sound like a bunch of cowboys (no offence to real cowboys, it’s a Uk expression for conman)
That issue is common and probably just needs a battery to motor cable not a complete bike !

 

[bubuthedog]

That shop sound like a bunch of cowboys (no offence to real cowboys, it’s a Uk expression for conman)
That issue is common and probably just needs a battery to motor cable not a complete bike !

Didn't know this expression and I will remember it. I like English slang ! I also was surprised by their thesis and think it's bonkers

Toodle pip !

 

[cream]

The fact that a Specialized authorized shop told you to buy a new bike because you have a problem with the electrical cables is hilarious...


Anyway, the voltage won't "come" from battery to the TCU but the other way around. TCU gets the power from the battery through the drive unit which has an internal DC-DC step down power supply. The voltage is 12V.

There are 3 cable harnesses on Levo/Kenevo. The cable from the battery to the drive unit, the cable from drive unit to the TCU and the cable from the TCU to the remote. Usually the cable from the battery to the motor fails (either the cable itself from flexing on each charge cycle or the Rosenberger connector (dust, water, magnetic debris etc). First, I would try the bike with a new power cable.

I don't have a diagram of the electrical system but the battery needs 5 connections (Power +, Power -, CAN-H, CAN-L, Wake-up line) with the rest of the system. The 6th battery connection is for the charging control (NTC).

TCU connector has the following signals:

1. 12V power from the motor integrated aux power supply
2. GND (-)
3.CAN-H
4.CAN-L
5.Wake-up line