I'm installing a Viper 5704 in a 2001 Avalon which, according to a bit of research, has some sort of lock detection circuit. In many of the install guides, it shows going into the door and tapping into 3 wires using a relay and a pair of diodes to allow the keyless entry to work the locks, as seen here:
https://www.the12volt.com/installbay/uploads/37Z_1070.pdf
https://www.bulldogsecurity.com/diagrams/extrainfo/diagrams/14301_AVALon_TOYOTA%20and%20LEXUS%20door%20lock%20interface.pdf
https://documents.audiovox.com/700664.pdf
I didn't have any diodes on me so instead of this approach, I went directly to the door lock switch in the door. The lock/unlock buttons simply connect the respective circuits to ground. So I wired the output of the Viper to those buttons and in effect the Viper is now pressing the lock/unlock buttons.
So far it seems to work. I've seen many posts about having to use the relay and diodes to properly interface the door ECU. Is the way I did it wrong or is there some other benefit of using the relay and diodes? Thanks for your help.
Some Toyota detention systems fall asleep after 10 minutes or so of exiting the car, then they stop working. Others, like yours i believe, are designed that if you lock the door by using the switch before the door closes the switch falls asleep.
-------------
Mike M2
Tech Manager
CS Dealer Services