How can I confirm giant front hub motor failure

Windy54

New Member
Region
United Kingdom
Background:

16 months ago coming back from a ride the motor on my wife’s Giant Ease bike failed, well we thought it had. When we got home I took the battery off, charged it checked cables etc.
Re-fitted the battery and the display powered up. No drive on the motor. Took it back to the dealer we purchased it from , they tested it by taking it for a ride and stating motor had failed.

due to covid , their excuse anyway, it was going to be 12 months before we could get a replacement and Giant ordered one under warranty.
We still have not got a replacement and Giant have lost all details of the warranty. They have just told us to take it back to the dealer, who again took it for a ride and said motor had failed.

Question.
is there anything I can measure to prove it is the motor, it is a front hub motor.
from what I understand of e bikes there has to be a sensor detecting the cranks are being turned before power is applied to the motor. There is no sensor fitted to the rear wheel, as per my e bike. So the sensor would have to be in the cranks?

I have tried searching the internet but can’t find any details, any suggestions would be appreciated.

Steve

PS we both have e bikes and just completed a 92 mile round trip on route 6 in England. Over two days with an overnight hotel stop.
 

PedalUma

Well-Known Member
Region
USA
City
Petaluma, CA
@Windy54, You have the image of this bike in your mind but we do not. Would you post a link to the model and some photos? Yes, on a hub drive there is a sensor on the crank for cadence.
 

J.R.

Well-Known Member
Region
USA
@Windy54, You have the image of this bike in your mind but we do not. Would you post a link to the model and some photos? Yes, on a hub drive there is a sensor on the crank for cadence.
Will do, it will be a few days
Is this the bike?


This looks like the sensor.

 

Windy54

New Member
Region
United Kingdom
I managed to take some pictures this morning. Hopefully I have covered everything. I had a look at the underneath of the bike and there is a cover I can remove. i am guessing this is where the pedal assist sensor would be and maybe a junction box.
when I am back off of holiday I will take this off and have a look.
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