2004 g35

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jb52_99

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Joined: September 20, 2005

Posted: October 22, 2005 at 10:55 AM / IP Logged

I need help with the 556 box. I can't seem to get it to work with wrapping with the loop. In the instructions it says to cut the wire in the ring. But when I take mine apart the only thing in there is a printed circuit board. Can anyone suggest any other way to make it work or where I hook up the wires to hard wire it.

KarTuneMan

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Joined: December 14, 2004

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Posted: October 22, 2005 at 12:34 PM / IP Logged

Follow the instructions carefully when trying to connect it to the factory transponder ring....I would suggest NOT, but you can if nothing else will work!

It could be defective as well......seen that a few times

KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: October 22, 2005 at 5:31 PM / IP Logged

Thats a simple one...

The G35 electrical system is cursed.

Good luck!

Kevin Pierson

jb52_99

Member - Posts: 7

Joined: September 20, 2005

Posted: October 22, 2005 at 9:18 PM / IP Logged

Should the vss wire read 12 volts. I have did a search and everyone is saying the white wire with a green stripe but that wire reads 12 volts with the meter is that right?

Chris Luongo

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Joined: May 21, 2002

Location: Massachusetts, United States

Posted: October 22, 2005 at 9:57 PM / IP Logged

The G35 electrical system is not cursed; those cars are just as easy as any other Nissan.

How do you have the 556U wired up? Red to constant, black to ground, blue to a ground-while-running output from your remote starter----the other wires are not used.

You shouldn't need to cut or open anything on the factory transponder ring---should be just pulling the little trim ring off the key cylinder, carefully (it's a little tight) put the 556U's ring in there, and put the trim ring back on.

Also, have you verfied that the rest of your install is good, and that the transponder key is the reason you're not getting it to work? Here's how:

Unplug the 556U. Place a good key in the ignition and try to remote start. If the remote starter works now, your problem is with the bypass-----if it doesn't work, the problem lies elsewhere.

TIP: Look at the red security light on top of the dash, at the very base of the windshield. If you start the car with a good key, the light stays out. If the car does not "see" the transponder key, the light will be on steady.

KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: October 22, 2005 at 10:37 PM / IP Logged

No, it really is. With the large amount of dependance on CAN bus signals, serial comm lines, and multiplexers the entire electrical system is very hard to manipulate. The remote start side of the car is straightforward, but take for example the door locks.

You push the lock button in the door and it sends a serial signal to the BCM which in turn fires the door locks. Its rediculous that you have to run wires in to the doors (which is a bad idea on the G) to lock (arm) and unlock (disarm) the car. The G35 has a problem with retaining water inside its door shell. Once you break the waterproof seal between the door and the cabin you are only asking for trouble, as the BCM sits RIGHT under where the door harness is. The BCM is not sealed. Its little stupid things like that that make me call the electrical system 'cursed.'

Oh, and if you want a fun project try to get the fog lights to turn on independently of the low beams using the OEM switch. The OEM switch is multiplexed (5ins, 5outs) to the BCM through a switching matrix, the BCM then sends a CAN bus signal to the relay box under the hood, which then turns the fog lights on IF the headlights are on. Fun stuff....

jb52_99

The VSS wire in the G should be a pulsing square wave, it should NOT read 12volts. What year G are you working with, is it a coupe or a sedan, and does it have stock Navi?

Kevin Pierson

jb52_99

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Joined: September 20, 2005

Posted: October 23, 2005 at 7:44 AM / IP Logged

It is a 2004 sedan no factory nav.

KPierson

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Joined: April 14, 2005

Location: Ohio, United States

Posted: October 23, 2005 at 8:39 AM / IP Logged

jb52_99 wrote:

It is a 2004 sedan no factory nav.

I don't have the service manual for the '04, but the '03 sedan manual states the VSS is WHITE/ green and runs between the dash cluster and the AC controller (the display in the top, center dash). You should be able to pull the trim straight out from the AC controller and then pull the whole unit out.

The car actually picks up wheel speed from the ABS computer that is located right under the drivers side dash, but it transmits the wheel speed over the CAN bus to the dash cluster. The cluster then outputs the VSS signal to the Navi system and the AC controller through a pulsing square wave that pulses from 0vdc to 4.5vdc.

If the car is a 5AT there is also a 2nd VSS wire that is pulled directly from the AT on a yellow/black wire. It runs between the tranny and the transmission controller, which can be found in the passengers side kick panel.

Kevin Pierson

KPierson

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Location: Ohio, United States

Posted: October 23, 2005 at 9:10 AM / IP Logged

jb52_99 wrote:

Should the vss wire read 12 volts. I have did a search and everyone is saying the white wire with a green stripe but that wire reads 12 volts with the meter is that right?

Just out of curiosity, what are you looking for the VSS wire for?

Kevin Pierson

jb52_99

Member - Posts: 7

Joined: September 20, 2005

Posted: October 23, 2005 at 1:06 PM / IP Logged

For the nav. for a kenwood radio I have installed.

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