With the Nissan Leaf, directly fitting a replacement battery pack (either new or used) results in a fault code (P3102) which causes the car to run in turtle mode where motor power is severely limited. This is because the vehicle control module (VCM) in the car and the lithium battery controller (LBC) in the battery pack must be coded/paired to each other for the car to operate correctly.
This has never stopped battery swaps being performed by the aftermarket, but for a long time it forced people into opening both the original and donor battery packs to retain the original lithium battery controller in the new battery. In addition to being more time time consuming and with increased safety risks, there were also issues associated with the original BMS having to re-learn the condition of the new battery and not being able to pick up lost ‘bars’.
At EVs Enhanced, after a lot of careful research and development, we pioneered a solution to eliminate this issue with a tool to successfully pair a different LBC to the car’s original VCM. This is exactly how Nissan designed battery swaps to be performed by their dealers, but they went to great lengths to retain control of that process for themselves only. With our battery pairing tool, like-for-like battery swaps can easily be performed by independent repairers in the safest and most efficient method possible. Pairing a battery with our tool after replacement now takes less than 30 seconds – simply insert the tool into the vehicle’s OBDII diagnostics port and press the one button.
Note that battery pairing is only required for like-for-like battery swaps. For battery upgrades using the current version of our Battery Translator Kits, no pairing is required.
Due to component supply issues, we were forced to discontinue the original Battery Pairing Tool. However, our revised version 2 features the same functionality with a new form factor. This tool can be used for an unlimited number of times.