During the course of your bike's ownership, it may become necessary to access the internal controller of the bike. This silver box holds some base-level programming for the bike, connects all the electronic parts together, and is vital for the bike's functionality. 

In this article, we will go over where to locate the controller, how to access it, and show the different wiring configurations. Since the Core-5 and LMT'D use the same frame design, these instructions are applicable to both models.

Controller Access Tutorial

Step 1: Locate your controller

There have been generational changes to both the Core-5 and LMT'D with the intention of increasing their performance and serviceability. The controller location has changed for more recent models and the notes below can help to identify which generation and model you have. 

ST Frame Styles

XR Frame Styles

There are two controller locations. On newer generation XR models, it is under the lower battery panel like the ST. On the older generation models, it is under the upper battery panel. A quick look at the headtube/ downtube junction can indicate the location:

Step 2: Removing the battery panel

Once you have determined what generation bike you have, it is time to remove the appropriate battery panel and reveal the controller. Once the screws are removed from the respective panels they will pull straight out revealing the controller behind. When removing or reinstalling the upper panel, it can be helpful to use the key to guide the lock/ panel into position. 

Step 3: Understanding your controller 

Once the panel is removed the controller will be directly behind it. The controller can slide out as there is nothing retaining it beyond the panel. Along with frame design, controllers have changed as well and the LMT'D and Core-5 both use different ones. While they may vary slightly the following tips are true for all controllers: 

  • Each connector is unique for each part. For example, a display unit cannot be plugged into where the motor cable would go.
  • When there are two of one component on the bike the plugs do not matter. For example lights, a headlight or taillight could be plugged into either of the controller's ports for a light, and it would work fine. 
  • Pay attention to how the controller was originally placed within the bike. The cables come out one end of the controller and for ease of reassembly, it is often best to put it back in the same configuration. 
  • When changing out a whole controller it is best to move the connections over one at a time until complete. 
  • Mark the new controller with tape or marker before starting. That way there are not mix-ups during the switch. 

Different controller configurations