Quote:
Originally Posted by foxmember
Kinginthehill, you are absolutely correct, the Wiletundra pulse generator works as advertised. The pulse generator is an excellent product by a person who obviously enjoys a challenge.
I have also tried to find a way to view the factory ”Rear Seat Entertainment System” video on the front NAV screen of my Crewmax (for the wife). I’ve built a new pulse generator with the 220K ohm resistor in order to have a pulse every 6 seconds. I have the parking brake wire grounded as required. The video image appears for 6 seconds and then goes out for a second then return for 6 seconds etc. In other words the image appears on the NAV screen (at any vehicle speed) but goes blank for approximately one second every 6 seconds.
This tells me that the video image could possibly stay on if the voltage on the speed-wire was a constant 12 volts. Naturally this would not enable your NAV functions but could potentially enable the RSES video on the front screen.
I also think the NAV antenna disconnection has potential. Good idea Kinginthehill.
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A constant voltage of 10 volts on the speed sensor wire might work to fool the rear DVD into playing on the NAV unit while in motion but I doubt it. I don't think it will work, though, since I suspect that the NAV uses the same function to check the speed sensor signal for both of the function lockouts. There is probably still some type of signal on the wire while the vehicle is stopped although I haven't been able to detect this in my testing. All of my meters just read a steady 10 volts from the ECU while stopped, yet when I fed that voltage into the NAV the functions would still remain locked. So it is not a significant pulse but it might be a very tiny fluctuation in voltage or an extremely brief or narrow pulse which doesn't show up on the diagnostic monitor.
One of you with the CrewMax and RSES should test this for us and let us know. You can connect a potentiometer between a 12 volt source and the NAV unit, then adjust it until you get a 10 volt output while in use. A resistance of 20-40 ohm should work depending on the current draw of the NAV. This
Radio Shack part might work.