Exactly where is the OBD2 interface socket on my new 2018 Prius Prime Adv?

It's under the left side of the dash right below hood release lever. In the photo below the white socket is what you are looking for.

 

We should make a sticky. and put this on the top

This is -the- most requested modification

 

I know there are currently four different ways to customize the reverse beep.

1. Ask the dealer to perform the customization using Techstream. Result vary by dealers from free, charge for labor, or simply a refusal to perform.
2. Use MiniVCI and techstream to DIY ~$30 for MiniVCI and pirated techstream (authentic one is way more expensive)
3. Use Carista dongle and it's app ($20 for dongle + subscription, but you can get free 30 days trial and cancel it for a free app)
4. Use Bluetooth ELM327 adaptors like ODBLink LX and Prius Tweak app (available only in android sideloading) $10~$50 for the adaptor, the app is free to download

 

It is ridiculous that they could charge or refuse.

First, Toyota should have given the owner the ability to do this themselves on the MFD.
Second, since they didn't the dealers should be required to do it free. The constant beeping is not, in my mind, a safety adder but a detractor. Hard to pay attention to other alerts when you are trying to tune out the unnecessary "warning" that you are in reverse. No sh1t Shelock, I put it there ON PURPOSE!

 

Why should this be a requirement? And how would this be implemented - a new law?

 

Required by Toyota since they have removed the owner's ability to turn off (to the extent possible) the back up beeper. There is nothing "safer" about an annoying beeping the entire time you are reversing. It isn't warning people outside the car, it is "reminding" you that you are in reverse. Rear collision alert would be a lot more obvious if the rear beeper wasn't sounding.

 

the App Dr.Prius support the Gen4 and the Prime ( experimental for now ) , the tick box for the reverse beep is there so if you have the OBDii adapter you can do it for free.

Dr. Prius / Dr. Hybrid - Bluetooth OBD2 – Apps on Google Play

 

This obd2 connector is in a bad location. Had my 2020 Prius Prime less then a week and forgot I inserted a OBD2 adapter into to plug while checking out an app called Hybrid assistant for android. After making sure it work I turned the car off and my instinct was to push the foot brake. Space is limited and I thought I had my foot on the brake, nothing else in that area, except when a OBD2 adapter is inserted and sticking down. Pushed the adapter and snapped the OBD2 plug and broke the bracket that keeps it secure and from wiggling. Parts hard to find as Toyota showed it as not a order able item and was listed as part of the wiring harness.

Found it in a google search in China and purchased it from a site that searches all the Chinese sites, obtains the item then they sends it from their location in China. Perfect fit and only 6 wires to move to the new plug if I remember correctly. Easy to do.

So be careful and don't forget to unplug you OBD2 adapter before going to the foot brake.

 

I bought a 90° adapter and extension from Amazon to move it away from that area. The 90° adapters out there are nice and flat. No problems in 3 years.

 

As another owner of a 2018 Prius Prime Advanced, I could not find it. Mind whacking me with a clue-bat? Where exactly is it?

I have an airbag down there, but no cut out like the picture shows.

 

Are you looking at the left side of the steering column below the hood-release lever? There is no airbag down there, AFAIK. Here is a wider shot of the cabin. The red arrow is pointing to the top of my OBD LX dongle that is inserted into the OBDII port.

 

The lower no. 1 instrument panel airbag assembly is there; see the Owner’s Manual (PDF), page 36, item ②.

 

Thanks for pointing out about the knee airbag. I didn't know. Here is a new photo showing the location of OBDII port in relationship to the lower panel SRS logo.

 

First, pat yourselves on the back. The pics and info given here are top-rate -- Toyota should be paying you guys. Kudos!

Attached is a pic of my Prius, an prime advanced with the plug-in option. It has the lower airbag as outlined in Salamander_King's pic above.

Crawling under where I assume the OBD2 plug should be there is no plug.



But -- this is what the pic illustrates -- there is an "empty hole". That hole looks what I would guess is about the right size to hold a plastic OBD2 female/receptacle plug. The "space" above the empty hole goes for a couple of inches -- more than enough space for a female/receptacle plug and some wiring to come in above it.

It makes me wonder if the entire OBD2 female/receptacle plug is missing (?). Or is it in another location on my particular Prius? (FWIW, I bought this Toyota-certified Prius from one dealer and have had it in to my local dealer to have a spare key made. I would hope they'd notice such a thing.)

 

The OBD II connector is a required part of the emission control equipment, and its location in the vehicle is specified by regulations.

More likely, the connector is somewhere nearby inside the instrument panel. The connector might have been removed from its mounting when a tracking device or other accessory was installed, so the accessory wouldn’t protrude downwards, where it might be seen or disturbed.

 

Wow... That's bizarre. Yes, it seems your OBDII plug is missing. So, you bought this car used? But if your local dealer (not the one you bought the car) did program a second key, then they must have plugged in their Techstream into OBDII. So, the plug had to be there at that time. Did you check behind the panel to see if there is a loose OBDII female plug? It may be there but somehow the female plug got detached from the panel.

EDIT: Whoops, @Elektroingenieur got the response before me.

 

And the reasonable priced Panlong Bluetooth OBD2 Car Diagnostic Scanner worked perfect. You can also disable the seat belt ongoing warning beep with the free Dr. Prius app.