Just out of habit, one of the first things I do when i'm ready to drive off is to lock all doors, so it would be nice to have it all locked when in D. I dont' mind having all the doors still locked once i'm at the end of my journey.Option #2 woudl be easier to get running but it will frustrate you with little things like the doors staying locked at the end of the journey.
If you try adding in relays to automatically unlock at journey's end then it might also unlock when going between D and R or while parked at night.
The Camry circuit will probably handle those nuances.
Personally I'd rather leave it alone.
Don't think i'm well versed on this part though.2. make up your own circuit.
Perhaps use the wire going to the "D" light to drive a relay, which has the driven contacts wired in parallel to the switch for the door latches.
Not sure what to do when you shift back to "N" or "R".
I think the factory stuff has time delays to handle a quick transition from D to R (passing quickly through N).
Ok thanks. Sure we can start with the diagram. I would appreciate it. Thanks.#2 is the only one that would really be feasible. just put a relay on the D light and the P light. put the coil contacts on that circuit, and switch a circuit going to the body computer from the door lock switch. the relay on the D should switch the lock circuit, the P relay should switch the unlock circuit. I can write a diagram for it and point you in the right direction, but you have to take the dash and console apart to do it yourself. or pay me travel and hourly and that aint cheap for electrical.
1990 Cressida.What year is yours? if I have the book I'll take the existing page and MS paint it in.
I realized halfway through that wiring colors might not matter anyway since I've got a 92 TSRM which has different colors than my 90. you're putting the relays in line with the trans selector switch (on the side of the trans) and lights (in the console) I don't know for sure this will work (trans selector is touchy about resistances I found out trying get the cruise to work with my 5-speed) but it's the best I can come up with for now.