Auto-folding mirrors and turn indicators part numbers

I'm not saying this is the reason, but I wired my lights exactly like the wiring diagram, which means I effectively tapped into the violet and pink wires before they went into the PDBA and became the yellow and blue wires. The biggest reason I stuck to the wiring diagram was my OCD/desire to make future service easier, but I also wasn't absolutely certain if the PDBA did anything to the signal. After all, Toyota could have easily run the wires back to the rear light straight from the junction connector, but they chose to run them to the PDBA for some reason.

It's remotely possible there are some resistors in the PDBA that are reducing the strength of the signal for some reason. You're already working with K21 for the folding mirrors, maybe try switching to the violet and pink wires to see if that makes a difference.

 

Sorry I disappeared for a bit. Life got in the way of regular posting for a while there. I suspect you'll enjoy the new features. I think you can understand why I don't recommend the project to most people, but they sure are nice if you're willing to commit to a whole lot of work to get them. I'm pretty sure we're the only two people in the US and Canada that have them.

 

Regarding taping wires together to route them easier:

In my case, I actually pulled the door harnesses, unwrapped them, added the new wires, and taped them back together again. And for crossing the dash, I put the new wires into braided wire loom, then ran that alongside the main dash harness and secured it to it with zip ties. Made for a super neat finished job, but the effort vs. result means I wouldn't recommend it to any but the most OCD-types.

Also, tesa tape for the win.

 

A couple months back, I decided to try adding front side radar to my Limited w/Adv Tech. It hasn't gone well.

Physical installation was a breeze. Maybe two hours to pull the bumper cover, install the sensors, and replace the bumper cover. I got warning lights, but that was expected as the sensors have their own ECUs that need to be programed. That should have been easy: plug in GTS+, program the ECUs, then calibrate them. And that's when we hit a brick wall.

GTS+ has a bug with these sensors and a handful of cars(gen5 Prius, Grand Highlander, TX, RX) and it can't program them. There's a workaround, but it involves a Toyota department called TAS(Technical Assistance System(?)) that can only be used by dealerships.

So I went to the larger dealership close to me thinking they'd have more diagnostic techs and maybe more pull with TAS as they're one of the larger dealership chains in the Rocky Mountain Region. I took them all the info they'd need to do the job, but they went nowhere with it. I got the feeling they never actually listened to me and got sidetracked with inconsequentials. They eventually stopped communicating with me unless I actually went to the dealership and asked, but they never had any new info.

After about three weeks of nothing happening, I tried the smaller dealership in my area. By luck, I ended up dealing with the service manager instead of one of the advisors. She actually listened to me and was helpful(about halfway through she jokingly offered me a job - lol). But she had to run the creation of the TAS case through her Field Technical Specialist(basically a high-level tech that works for Toyota corporate and advises dealerships), and he doesn't think they can help as it's against policy to use TAS for any modifications even though they're OEM parts on a car that was designed to use them.

I even threw a hail mary and reached out to TCCN to see if they could help, but it turns out TAS is only available to dealerships, not independent shops at all.


So I continue to be stuck for the moment. The second dealership hasn't officially said no yet, but it doesn't sound good. I've got a second hail mary in mind, but it will require a copy of TechStream v18 that isn't filled with malware. If anyone knows of a good source, I'd love to hear. The other option is just to wait until GTS+ is fixed. It's updated about every three months, and the last update was July 1. But I think this bug has been around for quite awhile, so I don't hold out a lot of hope of it being fixed soon. Assuming none of the other options work, I'll probably disconnect the sensors after the next GTS+ update if they haven't fixed the bug.

It's just frustrating that something so easy has turned out to be so difficult, just because of a software bug. If not for the bug, I would recommend the upgrade to DIYers with Limiteds with the Adv Tech Package. Roughly $500 including parts, shipping, and the cost of 1hr dealership service for the ECU programming to get Front Cross Traffic Alert and Lane Change Assist.