gen 7 Celica - beeping from rear somewhere

[anonymous-user]

I've owned this car for a few years now , in the last few months every now and then when I stop the car and turn the ignition off a beeper starts up from what appears to be behind the drivers seat somewhere, and I can't figure out what its for / where it is.

Its a regular beeping, perhaps once a second or so, seems to be from the rear passenger area somewhere, stops if you lock the car or wait for 10 or 20 seconds, and only happens perhaps every 10 journeys or so. Never happens at any time apart from when you switch the car off after a run and remove the key.
Anyone have any ideas?

[190bhp]

It's the immobiliser for the alarm located in the DS rear quarter

[anonymous-user]

Sorry I missed this post, so thanks for the info - I've found the beeper tucked away behind one of the plastic covers that allows access to the rear bulbs.

It sounded again last night - I started the car and moved it about 20 yards, when I turned off the beeping started so I dived in the boot to locate the source.

Any reason why it goes off at such random intervals?
And what is it supposed to be informing me of when it starts beeping?

[pilchard8]

I second this, mine does this from time to time and Ive always wondered why. Its really random, doesn't do it for weeks then starts again when I turn ignition off.

[mrtwisty]

It's when you catch the lock button when removing the key from the barrel.