Hyundai Elantra: Installation - Transaxle 
Control Module (TCM). Repair procedures - Automatic Transaxle Control System - Automatic Transaxle System - Hyundai Elantra MD 2010-2015 Service manualHyundai Elantra: Installation

1.
Installation is reverse of removal.
In the case of the vehicle equipped with immobilizer or button engine start system, perform "Key Teaching" procedure together.
(Refer to Body Electrical System - "Immobilizer")