Hi, I had a start problem with my celica. tried to turn the car over and a constant clicking sound was made, however all lights were on and the radio was working.. thought possible starter problem, however, I have tried it again this morning and the alarm seems to be constantly engaged even when I have unlocked it!!! The alarm keeps going off.. Maybe this could be the problem? If so is there anyway of reseting the system and how?

The problem is that your battery is extremely low. The repeated clicking sound is your starter relay trying to engage, then releasing again when the starter takes the remaining voltage available to try to turn. When the relay disengages, the starter can no longer take any voltage at all, so the relay again engages and the process starts over. This results in "CLICK, CLICK, CLICK, CLICK...." There simply is not enough power available to operate both the relay and the starter.

Your alarm system doesn't have enough voltage to function properly. It "thinks" that someone is trying to steal your car or is messing with your battery cables. It doesn't know the difference between low voltage from a dead battery and low voltage from somebody disconnecting wires. It is simply responding to the low voltage condition as it is designed to do. Fix the voltage problem and you will fix your security system. No need to reset anything.

Jump-start the car or replace the battery and get your charging system checked to make sure everything is functioning properly. It is possible that the battery is good but you have a bad alternator and the battery is low because it is not being charged.

Sounds like the battery to me. Constant clicking is a low battery. And when it gets low enough this will make everything else go crazy. Like the security.