Toyota Corolla 2021 4A proximity smart key successfully done by Lonsdor K518ISE and ADP adapter.
Add Key
Immo backup (already done before)
Add genuine key
Good job the Lonsdor team.
The smart box is behind the glove box. it is very easy to access. just remove one cable and connect the ADP cable. RAV4, CHR same place.
Procedure:
Connect Lonsdor K518, ADP with vehicle
Check the connection method here:
Select Toyota- Select from type- All smart key lost (2016-)- 4A- Backup Immo data
Identify current key number
Hold the register smart key close to the Start button, if hear buzzer beep once, take the key ways from button
Hold the smart key to be registered close to the Start button, if hear buzzer beeps twice, take the key ways from button within 30s
Register key success
Program key success