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Toyota Tacoma - installation angle won't work?


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  • 2 months later...

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 it hasn't even calibrated for 2D navigation yet.

 

The calibration data screen shows *no* calibration of any sort, even after 3 weeks of driving. This is exactly what it did when it kept complaining about the installation angle. It's also still showing the input voltage reading as 256 volts, which is just silly. (It's been doing that since about 2 weeks after I first installed it. Happen suddenly without any apparent reason.) I guess I've just got a fried AVIC.

 

So, I'm pretty much fed up with this thing. Unless anyone has any other suggestions as to what the heck might be wrong, I think this thing is destined for the garbage bin. I *might* give it one last testing session by removing it from my truck and hooking it up to my 12 volt power supply in my house, but I don't think I'll be putting it back in my truck after that, regardless of the results. I'm just tired of it.

 

Anyone want to buy an as-is AVIC-D2? :(

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Did you try resettingthe learning status after connecting the vss.

 

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.

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Did you try resettingthe learning status after connecting the vss.

 

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.

 

In the connection status menu when you drive does the speed pulse go up? If not then vss is not hooked to the right wire. Also check the recpetion of the gps signal, it could be bad.

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In the connection status menu when you drive does the speed pulse go up? If not then vss is not hooked to the right wire. Also check the recpetion of the gps signal, it could be bad.

 

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 the problem must be internal to the headunit.

 

I'll go ahead and disconnect the VSS wire, reset everything, then drive around again to see if I can even get a 2D Simple mode calibration running. I should at least be able to get that without the VSS wire hooked up. If that fails, then that must suggest the headunit is broken.

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Did you Check the antenna too?

 

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 that the gyros and VSS wire aren't calibrated yet (or if they are not even hooked up at all). It's got a solid gps signal; that's all it needs. While it's calibrating the gyros and VSS, it should still be able to function fully as nav unit unless I lose gps signal. Pioneer decided that's not the case, though, so they make the thing useless until it has calibrated all the sensors. Neither my dashtop Garmin unit nor my Alpine in-car unit in my other car require this. They are fully functional the moment they have a good gps signal. The internal sensor calibration (gyros and VSS) all happens in the background without you ever having to worry about it.

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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

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If that's the case, then you've got a problem with the avic. They normally start routing as soon as they're installed and picking up a gps signal.

 

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 make sure I was starting from a clean slate.

 

Sounds like there's definitely something wrong with the unit. That's unfortunate, since I bought it second-hand and it did seem to work when I first got it. I guess that puts the blame in my court and leaves me with an expensive door-stop. Too bad I bought the XM/NavTraffic unit for this thing. I guess I can still sell that, though, since it works great.

 

Any idea how much Pioneer charges for out-of-warranty repair on an AVIC?

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