Hey yall,

I am the new owner of a 2025 Camry LE, which comes with push start and proximity unlock for the trunk, but only "keyless entry" for the doors (I have to pull out the key fob and press the unlock button as opposed to unlocking when I grab the handle). Most of what I can find online says "just buy a higher trim" and so far what I've found about adding proximity unlock to Toyotas have been both different models and early 2020s. This was not such a deal breaker to me to warrant a few more thousand on a higher trim, but would be nice to have if I can make it happen in the <$500 range and could be a fun project.

I understand this is not a easy swap out, and I don't have a ton of experience on cars, but I work professionally as a control systems engineer so reading prints and dealing with wiring and controllers is not new to me.

I've come across lemon-manuals and read through some of the information there, to see what it may entail. So far what I've gathered is I would need to order the new door handle and that should be wired into the certification ecu, and then I would need to perform an ECU code registration. Would have to deal with running the new wires/cables from the door over to the ecu behind the glove box.

My concerns that you all my be able to help me in a general sense:
- I have yet to rip my car apart to see what's in there, I am hoping the certification ecu has an unused plug for the smart key door handle that just goes unused if that option wasn't selected because it does use smart key in the sense that it is push start and has proximity unlock for the trunk, plus this trim could have proximity unlock on the doors if the convenience package was ordered when the car was bought new. Would you all expect that to be true? Or would you more expect a Toyota to only have the plugs it needs and the upgrade would mean a new ecu with the additional plugs?
- Sounds like I'll need tech stream in order to register the handle after adding it. I have seen there are some shadier pirated versions of that software available since the real deal is "dealer only" price. Have any of y'all ever used something like that? Do they typically work just as good? Do they work at all?
- Do I need to worry about accidentally setting off any theft systems while I do this?
- The prints show the smart key handle as wired into the certification ecu AND a "digital key" ecu. My car did not come with digital key support either (using your phone and the app as a key). I assume this is so that the proximity unlock can detect your phone instead of the key fob. Would you all expect the handle to still work if I just plug it into the certification ecu and just leave out the digital key ecu plug?

 

Check if this is a factory or dealer option.

Toyota tended to NOT have the wiring for factory options. The car may have a wired harness plug but the plug terminals and wiring for said option are missing.

The best source of factory info is below:

Toyota - New Subscription (snapon.com)

 

Hey thanks for the info. It does seem to be a factory option. Do you mean that they typically don’t have a terminal in the ecu for the options?

As far as I’ve looked, there is only two “main” wiring harnesses, for fwd and awd. Then the door also only has two wiring harnesses, one with and one without the upgraded speakers. And the certification ecu seems to have options with and without “driver assist” and with and without “digital key” but it seems like digital key is not a requirement for smart key.

With this stuff in mind, you’re saying they somehow remove the cables/wires or the terminals they are supposed to plug into if that option wasn’t purchased before leaving the factory?

Really appreciate the input, I’m getting a lot of “this is just impossible” but without any reasoning. I’ll for sure buy the info version of TIS when I’m closer to having the time to start taking things apart and seeing what I find.