Hi all.

2005 G35 sedan rwd manual trans. does not have "infiniti intelligent key".

Occasionally the trunk won't open. When this occurs, all three trunk open switches fail simulateously:
- key fob trunk button
- trunk release switch on dash
- button at back of car, outside.

Plus, when this happens, the other features on the key fob work (lock, unlock car).

I have to put the key back in the ignition and turn it to the stop before the spring loaded (ignition) stop. Then all three trunk open switches work.

So my take is the key fob is fine, as are the other 2 physical switches in & out of the car. Also, the trunk lockout switch in the glove box is not the problem because it would inhibit opening of the trunk regardless of putting the key in the ignition.

Should I replace the ignition switch / tumbler -- where the key is inserted ? Or is there an electronics module that should be looked at ?

thanks

 

Sounds like it might be a bad relay somewhere in the chain, but I wouldn't even know where to look unfortunately. Maybe one of the electronics gurus will chime in with a more definite answer. In the mean time, check that the electrical connections in the trunk itself (there should be two on the trunk latch) aren't loose, but that's a long shot.

Unfortunately for you, intermittent problems are among the hardest to figure out, especially when electrical systems are involved

 

thanks. That's a pretty good guess. I'll have to investigate that.

Where in NC are you? I was thinking about joining the triangle Z club. Maybe there are G35 owners in it.

regards

 

there are relays in the fuse boxes by the battery, one is right in front of the battery(as if you were in the passenger's seat) and the other is right behind it, remove the battery box cover, trim and also remove the trim under the windshield wipers. maybe its one of those relays, from the looks of it, i think they are removable. cuz i coulda sworn i saw relays like that at autozone last time i went!

 

I'm down in Fayetteville, little far for me to get up there regularly.

Any luck with the trunk?

 

I've had problems in this area. The wiring that goes from the body to the trunk is one assembly. Apparently like a lot of parts these were subcontracted, and some of them are short, causing the fine wires inside to break over time. I lost the trunk mounted rear spoiler brake light, wire broke, and it shut down the entire braking system to limp mode. Another friend had his pulled out and additional wiring added (longer) which has worked out well. My trunk latch also stopped working, although everything else is fine. The cost quote to have it fixed was outrageous and open-ended - "wire could be broken, switch, or even the BCM is bad" and out of warranty giving the stealership a blank check to go fishing, NFW.

I ran a very thin dark cord to the emergency release under my back seat rest, I pull it and open the trunk. For now, that will have to do. Again the dealer no help there, they claimed once when I locked the keys in the trunk but had access inside the car the ONLY way to open the trunk was to remove the rear seat (all you have to do is flip the seat back forward, reach back and pull the release under the trunk lid).

Good luck, wiring issues on this car are a real bitke to fix, unless you have time, a good schematic, and a multimeter. Another problem area is where the wiring runs under the doors, running board is packed with wiring and I had another fine wire fail there, for what I don't even remember now.

 

I have had the same problem a few times with my 2004 coupe, and here's my theory, just for conversation's sake: Sometimes it is possible to shut the car down and pull the key out without the ignition being turned all the way back to the left. I'm not sure this is the case, but the last time my trunk wouldn't open, I got in the car and turned on the ignition and shut it off again and the trunk worked fine. Anyone else?

 

My '04 coupe has done this on occassion. It also has refused to open the doors on occassion. This problems almost always seem to happen when it's hottest out.
None of them have ever been a real issue (can open the doors with the key, the trunk by turning the ignition and trying again) so I've never worried about it.

 

The doors have never been an issue with me, just the trunk. Seems like a few others are having the same problems. It's funny how quirks of these cars sometimes only come out 7 years after the car was built!

 

I just fixed mine... seems as though nissan installed the trunk release cable too close to the wire harnes conecting to the lock... i must have pulled too hard on that cable and broke the plastic connector. used a little crazy glue and reconnected harnes and everything works fine now

 

my exterior trunk release button doesnt work either :/ any help there? key fob works and inside button works....

 

Hello.

problem: frequently the trunk release buttons (outside rear, inside dash, on remote) will not work.

A mechanic looked into it. He says code c1710 is being registered. Online searching suggests the right rear TPM sensor circuit is faulty (short).

Does this make sense? Does anyone think a tire pressure monitor sensor could generate a reading that would cause the trunk to fail to open? I could see that a tire might be flat and that might cause the TPM to tell the main computer to limit driving speed, but not stop a trunk from opening.

?
thanks

 

Honestly with the way they wired our cars, anything is possible. As a random guess, first thing that comes to mind is that somehow the trunk wiring is tied in to all other kinds of wiring (TPMS) included, which isn't a stretch because there's all sorts of stuff sharing wire looms. Possible that the wiring is somehow compromised or damaged in a way that effects a couple wires (for tire pressure which shows a code, and for trunk release) but hasn't caused any other major issues that would prevent you from driving normally.

That's just a guess and I think that if I was right you'd find it almost impossible to find/fix. I'm sure there are other possibilities but after doing some rewiring for my fog lights I've come to hate Infiniti's electrical engineers, I'm 80% sure their electrical system was designed by a marketing team.

 

did you accidentally bump the valet button/switch in the glove box? Try toggling it.

 

The TPMS is wireless - the sensor is physically mounted INSIDE your tire. It is battery powered and sends an RF signal to report it's status. If I am not mistaken it sends it to the keyless entry module which probably then sends the info over the CAN bus to the BCM to control the light.

I find it completely unlikely that a TPMS fault would cause your trunk to not open. I think it just so happens there are multiple things wrong with your car - each their own unique failure.

I also highly doubt that the trunk pop actuator would have a trouble code!