jreiter

Ah, that was actually my next question. When I *first* installed it after I bought it, it did indeed do that. I didn't have the VSS wire hooked up, but I did notice that the learning screen immediately started showing gyro learning data as soon as I started driving. After a couple of days, it gave me the "incorrect installation angle" error, and stopped learning. Ever since then, I've never been able to make it learn again. I've fixed the installation angle, hooked up the VSS wire, reset the learning data, *and* I've hit the reset button on the front of the unit after each change, just to

Sorry if I came across grumpy in that last post. I'm just getting frustrated with it. Regardless, I definitely appreciate all the help and suggestions everyone has provided so far. I've just never had this much trouble with any of the many nav units I've ever owned, so I guess my tolerance is a bit low. -joe

Yeah, signal strength is good. When driving around, it accurately shows me my position on the map no problem. (It always has.) Since it is not calibrated, though, it won't do any of the dynamic routing stuff. I can give it a destination, and it will generate a route to that destination, but once I start driving it won't give me turn-by-turn instructions, nor will it reroute if I get off track. I'm assuming it has to be calibrated before it will start doing all the routing features. This is one of the design decisions that frustrates me the most about this unit. It shouldn't matter th

The pulse count does not go up. Nothing at all happens on the learning screen. I know I'm connected to the correct speed pulse wire, as I verified with some other people on the Tacoma forums that I was using the correct wire. I also hooked up a scope to the pink wire running to the head unit to verify that it was indeed receiving the signal, and it is. On the scope, the pulse rate is reading correctly per the electrical service manual for my Tacoma. So, I'm reasonably sure the right signal is at least going into the pink VSS wire that runs to the head unit. That's what lead me to believe

I did indeed reset all 3 learning status sections (mileage, speed sensor, and gyros). Since then, it has done *zero* learning. It shows no mileage on the mileage counter, it shows no progress on the gyro sensor calibration readings, and it shows no pulse count on the speed sensor section. It's as if the whole learning process is on hold.

Just an update. A few weeks ago I finally got around to modifying my Tacoma dash to allow the AVIC to be tilted slightly upwards (rather than slightly downwards), thus fixing the problem of the unit saying the installation angle was too extreme. I also finally got around to wiring up the speed sensor wire. After that I reset all the calibration data and started driving around to get it calibrated. Unfortunately, to this day it still hasn't calibrated. It still says NOK for the speed wire connection (although I know it is indeed connected correctly, as I tested the wire with a scope), and

Unfortunately I *still* haven't gotten to it yet. (It's been incredibly busy at work, so I've been working late into the evenings most nights.) I'll definitely post here as soon as I get it modified and have some results to post!

Ahhh... great idea! That would allow me to push the top of the unit back, rather than pulling the bottom forward, and thus not have to modify the dash at all. Geez, why didn't I think of that?

Thanks for the pics, Socal! And yeah, that's exactly how I've got mine set up. You can't actually mount the brackets to the headunit using the other holes due to those little alignment pins. Also, it'd be way, way off if you did manage to. (And it'd be angled upwards!) I'm definitely going to have to take mine out again and eyeball everything. And you're right, Tacos are pretty bare to have a nice navi unit in them. Now if only I could get power mirrors that didn't require me to roll the windows down and manually adjust the darn things!

I definitely know I have the brackets installed right side up. (I must've done 20 stereo installs in Tacomas over the years.) The downward angle isn't much... just barely enough to make the AVIC grumpy. I'm also pretty sure the brackets aren't stuck on those little alignment nipples. The headunit is lined up perfectly with the dash when you snap the dash back on. I'll definitely double check that, though. Maybe when I get home from work tonight I'll pop that dash back off (since it's really easy) and see what's up. I've already pulled it out a couple of times now, though, trying to fi

Socal85, your headunit is definitely more level than mine. Mine most definitely is angled down a few degrees, while yours does indeed look pretty level. Well heck... how did that happen? I assume you're just using the factory brackets to mount it, right? If so, we must have different brackets that angle the headunits slightly differently. Hmm... weird.

Well, yeah, I've adjusted the angle of the screen to make it more viewable. It's the angle of the headunit itself that affects the gyros, though. Hmm... has yours never complained about the vertical installation angle? If you go into the Hardware Information screen (where it shows all the connection info), does it show your installation angle as okay? If it's all good on yours, then I wonder why mine doesn't like it. Just to verify, your headunit does angle downward a bit, right? A couple of degrees or so?

I have a 1999 Toyota Tacoma, and it's looking like my AVIC-D2 just isn't going to work. The problem is that the Tacoma dash is angled down slightly, thus giving the AVIC a negative vertical angle. The AVIC headunits require a 0-30 degree vertical angle; no negative angle is allowed. This means that the AVIC can't calibrate the gyros, and the nav unit simply will not work correctly. I've been driving around with it for a couple of months now, and no luck. It just complains about the vertical angle being wrong. So, has anyone else had any luck installing one of these in a Tacoma? (The

I'd much rather just not have the screen pop up at all.

Thanks for looking into this, bushing. I'd definitely like to hear about your results if you can figure something out.