Re-syncronise the remote control to the alarm system on the car.
What model / year of manufacture is your car ?
Oh - are you from Germany ?
Jack
August 2009
the imobilidser still works i,m assuming u mean remote alarm central locking remove 2 screws on panal under steering wheel pull out its the bigish panel you will see 2 fuses in middlle on big cable pull out fuses and replace untill remote alarm works again.this happened to me and Toyota could not fix it i found just buy luck.rav 4 1996
paul
November 2008
Recharge the car battery or replace the battery. Press both buttons ( on the remote plip ) down for 10 seconds , this should reset the alarm .