Recently changed battery on 2002 RAV4, now find immobilizer light constantly blinking. Also horn toot using remote lock no longer sounds. How do I reset immobilizer so it functions properly?

no magic wand to wave and bypass or hotwire vehicle and an 02 vin key is about $30 to $50 dollars re try to jump vehicle with different cables and or test cables if using the same ones sounds like cables arent good

change the battery on remote to start with

also disconnect the battery for 30 mins

Change the battery in the remote key.

put fuse back in disconnect batt wait 60 seconds re attach, when the horn starts honking lock and unlock drivers door with the key while doors closed window down. get in car and start it, should be fine now.

If you have a factory remote and the owners manuel there is a solution in the manuel. It tells you how long to hold down the lock button on the remote to reset it so the horn toots when you lock the doors. I do believe it to be 2 seconds or more. So you would lock the doors using the remote and don't let go of the button for at least 2 seconds. Hope this helped.

does the horn its self still work ?

replace the horn.thesecurity system should have a seperate horn to the normal "tooting" horn.

that system is part of D.A.S. 2( driver authorization system verson 2). the lights in the mirror will blink red when lock and green when unlock. during the self diagnoses portion they will blink simutanilusly when the remote key batteries are low and alternating when there is a malfunction with the key or other part of the driver authorization. it sounds like your remote key central locking batteries are low.

Make sure your hood is shut. I just got my 2002 Honda Odyssey back from the dealer today (90,000 mile check-up - I love my van and will drive it until it dies!) and when I went to lock the van with my remote transmitter, the lights didn't flash and the horn didn't sound. I open and closed all the doors and tailgate and I could hear that the doors were locked, but the security system wasn't working and that is why the lights didn't blink or the horn didn't sound. I walked up to the front of the van to check the hood to make sure it was closed (there isn't an indicator light for an open hood, only open doors) and the hood wasn't shut completely. Once I opened the hood and let it drop to securely shut, I hit the door lock button on the remote and everything worked like a charm! Hope this helps others in this predicament.