NOTE:
Refer to keyless transmitter for models without keyless access. 
1. Remove the mechanical key from the access key.
2. Insert a flat-tip screwdriver into the slot indicated by (A) after the mechanical key is removed to open the case.
3. Being careful not to touch the access key printed circuit, remove the circuit board.
4. Insert a flat-tip screwdriver along the side of the access key battery to remove the battery.
NOTE:
In order to prevent static electricity from damaging the access key circuit board, touch a metal part of a building to discharge the static electricity in your body and clothing before disassembling the access key.