DIY: All NAV Functions All The Time without Firmware Downgrade!

[kinginthecastle]

I seriously doubt that the 10v will work though. I checked by hooking up at 12v and the navigation doesn't register any pulses...yet after a short while, the nav realizes that it's not connected. I just don't see why the nav would think any different if it's 10v instead.

[ag4ever]

I know it may be apples and oranges, but my camry's nav will sometimes hold 10v whiles sitting still, and other times it will have 0v while sttionary. While crawling along it gives slow pulses from 1v to 10v, and above 2 mph, the pulses are extremly fast with the voltage staying around 10v.

I am not sure what the conditions are for it to decide if the voltage should be 0v or 10v while stopped.

[wileetundra]

As I have said before, I seriously doubt that any fixed voltage will work to recreate the ECU speed sensor signal when the vehicle is stopped. I tested this when trying to unlock the NAV functions and it didn't work so I see no reason why it would work for the RSES video.

I believe there is a very low or high freqeuncy digital signal on the wire which is not readable with a standard voltage meter. Someone with an oscilloscope should be able to test this but I don't have one of those. Even if we could confirm the exact signal it is unlikely that we could easily duplicate it with devices that are built by novices using over the counter parts.

The beauty of the speed pulse generator device is that it does properly emulate a speed pulse signal which is adjustable between 0-6 kmph depending on what resistors and potentiometers are used, and it is fairly cheap / easy for novices to build from locally available parts. Unfortunately the NAV needs to see a pulse at least every 30 seconds in order to keep the functions unlocked, and the RSES video will shutoff briefly during each pulse.

My only remaining theory is that the signal when stopped is actually a very narrow (short) pulse, so brief that it does not display on the meter or diagnostic screen, and that it only comes in intervals of 1 pulse every 20-30 seconds. My very first device allowed the pulse width to be adjusted with a 1K potentiometer and I did a little testing with it, but I never tested it any further once I saw that the wider pulses were better for the purpose of unlocking the NAV functions.

So I might build a new device with an adjustable pulse width spanning a wider range, and then test a slow narrow pulse to see if this will enable both the NAV functions and the RSES video. First I need to complete my mod to enable the second video input on my NAV, however, since I have a DC without the RSES unit. And to be honest this isn't a huge priority for me right now since I am already watching full video on the NAV via the rear camera input, and my existing speed pulse generator device enables all NAV functions while in motion.

I am also building several additional video screens for various places inside the cab, which will only cost about $35 each when completed, and they will enable lots of other uses including my blind spot cameras, trailer camera, tire/road views, and audio as well.

[Pepsi]

I have a Toyota Camry Hybrid 07 and have successfully installed the pulse generator. I believe this is the same unit as the Tundra. I also added a low powered LED to the output signal so I can tell if I have the unit switched on or not. I can also see the LED flicker off when it pulses which is cool too. Also for power, on the same connector that has the speed sensor and reverse sensor, the black wire is 12V power which is what I used to power my unit.

On a side note, I tried to hook up a video signal using the reverse camera video input and am not getting successful results. I get an image from my portable media player but the image is not horizontally or vertically syncing and is in black and white. Any suggestions anyone?

[wileetundra]

OK gang. I have learned several things:

1. This forum has a LOT of members which want to enable all the NAV functions. Bad design courtesy of Toyota Legal. Thank God for mods!
2. Many of you are from California, Canada, and Texas. Did they put something in the water or are the Tundras required by state law?
3. My to-do list grows longer yet I keep tinkering with the truck projects. When will the madness stop?

I originally made the first speed pulse generator for myself and published the schematic info to help others make their own. Then I was hit with a few special requests to build them for people that couldn't or didn't want to make their own. So I built a batch of them which quickly sold out, yet the orders kept coming in. I didn't want to leave anyone hanging so I repeated this loop by making and selling batches 2, 3, and 4. I have now shipped these devices to many states and several countries yet the PMs keep coming in. So I built a fifth batch tonight when I should have been working or sleeping, and then the first few of those sold before the solder joints were even cold. I was literally watching the email come in as I was soldering.

So as of right now I have about 5 units left from the fifth batch. If you are on the fence then now is the time to order. If you already PMd me to get the payment info then be advised that I will ship in the order that payment is received so someone else might beat you to it if they pay first.

If you are building your own device then be advised that I have updated the circuit design slightly and didn't have a chance to publish a new install report for it yet. The new design uses two less parts and is set to the optimum pulse range based on my testing and feedback from satisfied forum members. Not a big change but it does help and leaves less room for error.

And for anyone that hasn't read all the threads and posts: this speed pulse generator device will unlock all NAV functions while you are in motion. Details are in my install report (see the link in my signature).

[wileetundra]

Originally Posted by Pepsi

On a side note, I tried to hook up a video signal using the reverse camera video input and am not getting successful results. I get an image from my portable media player but the image is not horizontally or vertically syncing and is in black and white. Any suggestions anyone?

I have successfully fed the video in through the rear camera input. It comes across in vibrant full color with no problem. I suspect that your wiring is not connected right or perhaps you are using unshielded wire which loses signal and allows interference to leak in.

[hamm3r]

Originally Posted by Pepsi

I have a Toyota Camry Hybrid 07 and have successfully installed the pulse generator. I believe this is the same unit as the Tundra. I also added a low powered LED to the output signal so I can tell if I have the unit switched on or not. I can also see the LED flicker off when it pulses which is cool too. Also for power, on the same connector that has the speed sensor and reverse sensor, the black wire is 12V power which is what I used to power my unit.

Thanks for letting us know it works in the Hybrid! I'm confused by your description of the power. According to the picture on Wile's tutorial, there is no black wire on that sensor.
hmm, I keep trying to paste a link to the photo, but when I submit the message board removes it. Here it is just remove the dashes.
w-w-w.pinemountainfirearms.com/pmf/tundramods/Big/SpeedPulse12.JPG

Another question. Is anyone worried about voiding warranties from splicing this device onto the wires? Like if something goes wrong with the NAV unit, etc, that they won't honor it?

[mikel58]

Does the Nav unit have an RCA pre amp output? I am looking to upgrade my stereo setup and was haping the nav would at least have rca outs.

Anyone?

[Pepsi]

Originally Posted by hamm3r

Thanks for letting us know it works in the Hybrid! I'm confused by your description of the power. According to the picture on Wile's tutorial, there is no black wire on that sensor.
hmm, I keep trying to paste a link to the photo, but when I submit the message board removes it. Here it is just remove the dashes.
w-w-w.pinemountainfirearms.com/pmf/tundramods/Big/SpeedPulse12.JPG

Another question. Is anyone worried about voiding warranties from splicing this device onto the wires? Like if something goes wrong with the NAV unit, etc, that they won't honor it?

In hindsight, I guess I shouldn't identify it by color. They might be different on different models of cars. The connector that includes the speed sensor and reverse sensor is the "F13" connector which has 5 pins. Looking at the male end of the connector with the clip on the top, 1 is on the right and 5 is on the left. Pin 2 (F13-2) is power suppling 10V-14V when the ignition switch is on. Pin 3 (F13-3) is the speed signal. Pin 5 (F13-5) is the reverse signal. I used F13-2 as my power so I would not have to splice any other connectors besides F13.

As for my video problems, I found out my problem. I did not ground my signal. Once I tied the negative wire of the video signal to the car's ground, a clear vibrant picture showed up. (I tied F12-21 and F12-23 together)

[ag4ever]

Originally Posted by hamm3r

Thanks for letting us know it works in the Hybrid! I'm confused by your description of the power. According to the picture on Wile's tutorial, there is no black wire on that sensor.
hmm, I keep trying to paste a link to the photo, but when I submit the message board removes it. Here it is just remove the dashes.
w-w-w.pinemountainfirearms.com/pmf/tundramods/Big/SpeedPulse12.JPG

Another question. Is anyone worried about voiding warranties from splicing this device onto the wires? Like if something goes wrong with the NAV unit, etc, that they won't honor it?

See the following picture for the wires on the camry hybrid nav.

Note the speed sensor wire for this car is the purple wire, which is different than the tundra color.

[wileetundra]

Originally Posted by hamm3r

Thanks for letting us know it works in the Hybrid! I'm confused by your description of the power. According to the picture on Wile's tutorial, there is no black wire on that sensor.
hmm, I keep trying to paste a link to the photo, but when I submit the message board removes it. Here it is just remove the dashes.
w-w-w.pinemountainfirearms.com/pmf/tundramods/Big/SpeedPulse12.JPG

Another question. Is anyone worried about voiding warranties from splicing this device onto the wires? Like if something goes wrong with the NAV unit, etc, that they won't honor it?

Remember that connectors, pins, and wire colors can be different for each vehicle and also depending on the options which were factory installed. The only way to be sure of which connector / pin / wire to use is to check the wiring diagram for your vehicle.

I am not worried about warranty since I was very careful when tapping into the wires behind the NAV unit. When you remove my NAV unit you can't really see anything different at all. The new wires are hidden and wire-tied with the rest of the factory wires and the splices are hidden well too. Even if the dealer found the wires or my toggle switch panel then I would just set all the switches to factory mode and prove to them that my mods were not causing the warranty problem. I really think the chances of a factory defect in the NAV are pretty low but I don't think they could decline to fix it even if you admitted modifying certain functions, as long as you don't do something wrong or open up the NAV unit itself.

[wileetundra]

Originally Posted by mikel58

Does the Nav unit have an RCA pre amp output? I am looking to upgrade my stereo setup and was haping the nav would at least have rca outs.

Anyone?

There aren't any RCA connectors behind the NAV but I am sure there is a suitable connection you could tap which runs down to the factory amp. There have been many posts on this forum about hi-fi stereo upgrades which include equipment and wiring details and lots of pics. Search for those and then ask the forum members who authored the threads. I think PS-RagE was one of them.

[ag4ever]

I am not worried about voiding the warranty either.

If I burn something up, then it is my fault, and not Toyota's and I should be responsible for fixing it.

But If my transmission goes out, and they think it is because I cut a wire going to my radio, then they will have one heck of a fight on their hands.

It all boils down to responsibility. I am responsible for my actions, and I expect others to take responsibility for their actions.

[kinginthecastle]

OK...I have been REALLY reluctant to take that step. I feel like if I take that step, there is NO turning back. Splicing the antenna wire and hooking it to the switch so that, ahem, my passenger can watch DVDs while I drive to Mammoth. And it may cost a pretty penny, but at least these guys are local and they told me they don't know when the next batch is coming in, but when they do they'll let me test it out. But it looks to me like this module may have a connector in/out for the nav antenna. So it looks like it may do exactly what I've been looking for it to do. plus it comes with a nifty toggle switch looking thing. Anyways, check it out guys!

nav, phone, and dvd playback at my finger tip (slightly 56k aware) - Page 3 - Club Lexus Forums

[zpaul]

Originally Posted by wileetundra

I have successfully fed the video in through the rear camera input. It comes across in vibrant full color with no problem. I suspect that your wiring is not connected right or perhaps you are using unshielded wire which loses signal and allows interference to leak in.

My installer tapped into backup camera. The only problem I noticed that while driving the NAV works, but it does not guide you, only notifies that you arrived, and when I made the wrong turn it did not recalculated the route. Do you experience the same problem, or your nav is working fine? I did not have much time to play around with it, but those are couple things that I noticed. Any advise.
Here is my post. Video on the NAV screen from another video source!!!
Thanks a lot.