Can anyone identify 2010-11 nav headunit's unlabeled sockets?

The ones shown in the wiring diagram, no problem. The AM/FM and GPS antenna sockets are easy to confirm (by pulling them out and having the AM/FM or GPS stop working). But in my 2010, there are some sockets on the back that I don't see in the wiring diagram, and nothing in the car plugs into them, and there are no labels on the back of the unit, so ....


On this unit, the AM/FM antenna socket is the same old round Motorola socket I had on my first car. There is a similar but smaller one just below it, where nothing plugs in (??). Strangely, the wiring diagram does show an "FM sub" antenna, which I don't think a 2010 or 2011 actually has (didn't the wire-printed right quarter window start with 2012?). I wonder if maybe that smaller socket is to allow such a diversity antenna, but the 2010-11 car just doesn't have one.

The gray square RF connector is obviously the GPS antenna. The blue (??) also looks like an RF/antenna connector of some sort, but nothing in the car plugs in there. Anybody know what that's for?

This is the model where the XM satellite decoding isn't done in the head unit, there's a separate box under the driver's seat and I think the satellite antenna goes straight there, not to the head unit. So I'm at a loss what other antenna that blue socket could be for.

The final mystery is the L45 socket - this one is shown in the wiring diagram (that's how I know it's L45!) but nothing in the car is plugged into it, and in the diagram I didn't see any circuits drawn to it!

Anybody know any of the missing details?

-Chap

 

Ooh, nicely spotted. I see the similarity ... but I'm not sure I quite see an exact match. The USB connector looks more square (even allowing for it being shown at an angle) ... and I think the blue connector has pins in that inner area; the inner block in the USB connector looks solid, closed on the end.

The other thing is, I'm not sure why this head unit would have a USB socket on the back. The 2010 does have USB, but the cable runs from the center console over to an add-on MP3/iPod player under the driver's seat (stuck to the bottom of the XM satellite decoder with double-stick tape).

Ok, this audio system has still more mysteries. At the right rear headliner corner, there are two plugs joining antenna wires. Each plug has two coax cables (that's four total!), plus the white one has one more plain wire that I assume is power to the antenna preamp:

Unplugging the white one loses the AM/FM, and makes the satellite/XM give a blinking "ANTENNA" message. Unplugging the gray one lights up the SafetyConnect error LED.
Ok, so that accounts for both coax cables in the white one, and one of the two to the gray one. What's the other one for?
It shouldn't be the GPS antenna ... that's buried in the dash, way up forward under the windshield.

-Chap

 

Found the mystery blue connector. It is in the wiring diagram, just not if you are looking at the Navigation Receiver page where you'd be inclined to look. Look on the Intelligent Parking Assist page and there it is, L105, connecting the parking assist ECU to the nav unit.



Now I get why the separate "Overall EWD" section of the wiring diagram is useful ... there, the nav unit is shown with an extra, L105 connector, and a cross reference to the parking assist page.

-Chap

 

As it turns out, that connector is a GVIF video input. Contrary to the diagram, it's not a magical one-wire interface ... Toyota just drew it as "one" position, standing in for the actual GVIF pinout.

Seems to be how the parking computer draws its calculated parking space outlines over the video being shown from the camera.

-Chap