The OBDII port is powered even when the car is off - it just most likely can't read the ECU. The ECU might not be accessible until the ignition is in the accessories on position or engine on position. Some newer cars will have ECU read mode when car is off - I don't believe the 4R is this case. What ever you are plugging in might need the ECU to be in read mode to stay on.

Interesting, thank you. One prime example is the Valentine One's ODB power port used to power their radar detectors. It works perfectly, and once the vehicle is turned off it will shut the radar off after a few seconds as well.

Digging up this somewhat old thread.

Has anyone used this on a 2020?

I am wanting to do a lot of the typical customization, as well as get all doors to unlock with the keyless entry. Was hoping someone had experience with a 2020 model.

I just bought it ($30), activated the one year subscription (free for first 30 days), tweaked a bunch of stuff on 2 different 4Rs, cancelled the subscription, and sold the adapter ($20)... so I was able to adjust all the settings that were making me crazy for the low, low cost of $10 and 20 minutes of my time!

If all you want to do is adjust settings I think it's a great deal, way cheaper and easier than Techstream.

I modified:

-ECO bar off
-Seat belt buzzers off
-Headlight "coming home" time to 0
-No more auto relock if you hit the unlock button on remote but don't open the doors immediately
- Windows down from remote
- Disabled auto door lock linked to transmission gear
- Silenced remote lock/ unlock beep
- Windows up/ down from driver's key slot
- Rear wiper set to 5 seconds with tear wipe cancel
- Disabled panic alarm

I see no reason why it wouldn't and Carista's website shows it will work. Worked on a 17 SR5 and a 19 ORP, other than the addition of TSS there's no difference from your 20.

Oh yeah! I've since used it on my 2020 and it was awesome; best $35 i've spent on the rig!

Thats what I was looking for- wondered if Torque would work with the Carista OBD plug in. I run Torque on 2 different vehicles and don't want to be moving my ELM device back and forth. Mostly because it is a PITA to access on my other vehicle.

^^^

Well crap- tried and tried to get the Carista OBD plug in to work with Torque. Gave up and ordered another $13 ELM OBD plug in.
Somewhat academic now but I'd love to know the trick to get the Carista one to work with Torque.

Carista accounts are tied to the phone account and not the unit itself? Meaning I can use my old Carista I used for my 19 on my 20 but have to pay since it will recognize it as a used account right?

I take it they refunded you in a prorated fashion?

Panic button is awesome!!

Nice. I thought that since the 20 allowed you to control some stuff like the ECO light from the info system that Carista wouldn't work. Thanks for the confirmation

The first part is yes - tied to the phone / app. The unit is just the physical structure.

Second part - dunno.

Outstanding. Thank you.

Hope you got the full years refund! Would suck if they charged you for it when you dumped it soon after.

IIRC they don't charge until after the trial period. I signed up with Google Play so there's an extra level of protection.