Giant power off issue

[jerry m]

Hi All.
New to the forum, so be gentle
So my bike is a Giant Fast Road 2+E, bought in March 23, so still has 1 month warranty.
In April 23 the bikes power failed during a ride. I took it to the dealer and they fitted a new battery. All seemed fine but it wasnt until someone else rode my bike ( they had the same model), that they said its not right. The fault was the bike would switch off if i lowered the assist below the eco (1), i thought thats what it should do and didnt question it, as it was the first electric bike i rode.
So back to the dealers in Aug 24. They gave me it back saying they couldnt find anything wrong with it, and said they updated the software?
Earlier this week it kept shutting off, even with light assistance. Today it seemed to be ok as i was in 52km, and still had 46% and was on a slight incline so set it to eco, and within 100 mt it switched off. It switched on when i tried 10 mins later but immediatly switched off.
I stopped, took the battery out, and it wasnt hot, i felt the motor and it wasnt hot.
The error light was flashing and it was on L4 which in the manual is blank. Any ideas what it could be?

 

[DaveMatthews]

I have a 2021 Stance E+2 Bought in Jan 2021.
3 months later it developed a power off issue. Tried shim on the battery connector, controller replacement, and battery.
Giant ended up replacing the bike and battery. They put my existing wheels/bars/set/pedals on it.
It's been rock solid for 4 years now.

 

[Marecki]

Sorry to hear about your problems. Not sure it it help but there is a description for L4 error:

2022 Regin fault code.

That’s right Giant has chosen to keep that hidden just incase we might be able to repair ourselves. How silly of me. I guess it’s into the LBS to find out what a top flashing red light and limp mode is all about. 20 minutes into a climb and my zero let me down. Stay tuned. 🧐

www.emtbforums.com

 

[jerry m]

Thanks Marecki, now to find what the smart gateway is all about.
Bike will go back to the dealer

 

[Kiwiscoot]

I have a 2021 Giant Trance X E+ Pro 3 (2500kms on) with the same issue. I replaced the Controls but that did not fix the problem. Does the same thing with a brand new battery too. Had it back to the shop where they updated the firmware, cleared out all the logged fault codes and put the factory recommended shim under the battery discharge connector, but that did not fix the issue. Sometimes I can do a hard ride and it will cut out only after some kms and other times just a mild ride around the neighbourhoods and it will do it. Mine just flashes the red light for a split second. Currently back at the shop.
Will be interesting to hear what your shop finds.

 

[jeanmarc]

I have a 2021 Giant Trance X E+ Pro 3 (2500kms on) with the same issue. I replaced the Controls but that did not fix the problem. Does the same thing with a brand new battery too. Had it back to the shop where they updated the firmware, cleared out all the logged fault codes and put the factory recommended shim under the battery discharge connector, but that did not fix the issue. Sometimes I can do a hard ride and it will cut out only after some kms and other times just a mild ride around the neighbourhoods and it will do it. Mine just flashes the red light for a split second. Currently back at the shop.
Will be interesting to hear what your shop finds.

Sorry to hear the solution seems hard to find, my Reign E+ recently had a red light causing the bike to malfunction, it was caused by a misaligned speed sensor. Hope this helps. Cheers!