I spent the weekend with a few members of the Florida G35 club and had the opportunity to install a http://www.KPtechnologies.com navigation 'OK' bypass unit. This particular unit also has the ability to bypass the Navi's speed sensor to allow input while driving.

After the unit is installed you can trigger the speed sensor bypass by pressing the 'OK' button twice within one second. The output stays on until you are done programming, and then automatically switches the speed sensor wire back to factory specs to help maintain accurate location, mpg calculations, and maintenance records.

The install took about 2 hours, including both work and social time. It also accounts for putting the center console back together wrong and having to take it all back apart to straighten out the control panel (it was a BIT crooked).

Basically, you have to remove the entire radio unit, which requires you to uninstall the running boards on both sides, the kick panels on both sides, the drivers side under dash finisher, the glove box, both center console side pockets, the shifter, the shifter trim piece, the clock/ac controls finisher, and the clock.

Once out, you have to remove the actual radio unit from the entire assembly (you must remove one ribbon cable between the circuit board and the radio assembly). With the radio unit removed you can remove the Navi screen. With the screen out you can access the Navi control panel. There are four scews holding the plastic housing together that shields the Navi control board.

With the Navi control board exposed you have to solder the orange wire from the module to the actual circuit board.

The yellow wire of the KPtech unit was soldered to the white/black ignition wire right by the ignition switch. I went all the way to the VDC switch for the ground, just because I wanted to solder it, too, and I knew it was a good ground.

This module requires an external relay, so I also hooked pin 86 of the relay to the white/black ignition wire. Pin 85 went to the green wire output of the KPtech module. Pins 30 and 87A were twisted together and ran behind the radio over to the Navi unit. I cut the white/green wire and hooked pin 30 to the navi unit side of the white/green wire , and pin 87A to the other side of the white/green wire.

The KPtech module has an adjustable timer on it to program the delay. It took about 3 mintues to set it absolutely perfect so the button is pushed as soon as the OK button pops up.

After it was tested, all we had to do was put the entire interior back in the car and we were done! Now, for the pics!


Radio out of car (generic picture taken from the internet)


Radio assembly out, taking actual radio off of circuit board


Radio removed, Navi screen removed, access to Navi control board


Circuit board where wire needs to be soldered

 

nice work.

Do you have pics of the vehicle speed sensor part of the install?

 

Hey guys. I was one of the FGC members who was there when Kevin worked his magic and installed the nav bypass module. For someone with a NAV, I cannot wait for this mod that will both hit the stupid "okay" button and input while driving. The install this weekend went perfect and I'm impressed at KP's knowledge of this stuff. Amazes me everytime. Mine is officially on order...

 

I don't have any pictures of the speed sensor wire, its really easy to find with the car torn apart. There is a plug on the back of the navi unit with a white/green wire in it. I believe its the only white/green wire that plugs in to the navi.

 

Thanks for the great write up on the install. I did it myself this weekend, here are a few additional pics:

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Might have to look into this for my 05 if the install isn't too hard. I hate how the navi can't be used while driving.

 

The '05 is MUCH easier then the '03/04.