Hello everybody, I have a 2010 G37 with Bose and sat nav system. It's a 7 speed AT and the camera and the reverse lights are not engaging.

I've searched the forum and google but haven't found a solution yet.

Things I've tried:
*Changed fuse #4 next to the parking brake
*Changed the relay under the LCD screen to the
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*Tried the bulbs and they are working
* Tried the camera through the service menu and it works fine.

One cold morning the lights and the camera came on for a split second and then went off again. Haven't seen them work since.

I've been trying for a year, and there is no infiniti dealer in my city. Any thoughts?
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I wonder if whatever sensor that turns it on when you put the car in Reverse gave out..? Not sure what it would be called but that's what my guess would be.

 

Could also be that you've lost a wire in your trunk passthrough - maybe a shared ground wire (a guess without actually looking it up). I'd suggest pulling back the rubber boots that house the wires going to the trunk lid and checking for frayed or broken wires.

 

Can anyone tell me where this sensor is located?

 

I had a look, couldn't see anything out of order there. Everything looks intact. I'm really puzzled

 

it shouldn’t be anything in the Pass through since the camera came up when you were going through stuff on your settings and what not. That’s why I’m thinking it’s the sensor that detects when you’re in Reverse. I’ll see if I can find anything on that today for you. I’ve never looked into that before so I’m not sure what’s out there as far as the sensor location(s) and what-not.

 

Not necessarily. OP may be just seeing the guidelines and not the actual rear image. The guidelines are superimposed over the rear image signal. Hard to tell as OP was not specific.

I do agree that it is likely a switching/wiring issue due to both the camera and the reverse lights being affected.

Here is what I suggest @Young-G :
With car running and AV/Radio OFF:
1. Enter the AV diagnostic menu:

2. Select CONFIRMATION/ADJUSTMENT:

3. Select VEHICLE SIGNALS:

4. Take note of REVERSE SIGNAL value:

With the car running and in PARK, that signal should read OFF.

¹Put the car in REVERSE, does the signal change to ON?
²Does the indicator (between speedo & tach) on the gauge cluster change from P to R?
³Put the car back into PARK, does the signal change back to OFF?

If that signal value does NOT change, the issue is likely with the SHIFTER POSITION module.
If that signal value DOES change, then the issue lies further downstream- likely the relay or wiring.

Let me/us know what the results from the diagnostic when you can.

 

Thank you for the detailed explanation, I really appreciate it!

First of all, I am actually seeing the image and the guidelines through the service menu so the camera is fine.

1. The signal did NOT change to ON. It remained on OFF.

2. The indicator between speedo & tach changes from P to R and the light on the shifter turns yellow on R.

If you could post a picture or a part number for the shifter position module that would really help, I'm not sure if it is the whole thing or just a pice of the shifter.

 

When I search for the shifter position module, I found one but all of its wires were clipped. So I don't think it's one of those things where you can unplug and replace the old one unless you want to cut and splice in the new module... You might have to get a whole new floor shifter assembly.
https://www.ebay.com/itm/11-12-13-20...-/163701626620
I'm seeing used shifter assemblies anywhere from $40 to over $100.

 

The reverse lights are likely the trigger for the camera. The fact that both are not working would almost verify that. I think your diagnosis needs to start with why the reverse lights aren't getting power. I'm not an electrical expert, but I am the guy that relatives or friends call to help diagnose electrical issues because I can usually figure it out. My way to diagnose this would be to start at the harness and work backwards. You've already done some diagnosis so it seems you should be able to figure it out, just keep working backwards til you find power.

I am not well versed in the G because I never purchased one. From a quick search there should be a relay under the hood. I'd short that relay to see if the reverse lights light up. I also don't know if there is a switch on the trans. If there is you could check it too.

Its funny because this reminds me of chasing why the reverse lights weren't working on my 3000GT when I finished putting it together. After lots of research and probing and checking harnesses it was pointed out to me that since I had a 2g harness in a 1g car I had to make a jumper. For some reason Mitsubishi moved the location of the reverse power wires between 93 and 94. It took me forever to find the answer, but thankfully a helpful forum member pointed me in the right direction. I know exactly what you are going through. Hopefully you'll get it figured out. You seem to be on the right track.

 

I think your shifter is fine because the gear indicator in the gauge cluster changes. This indicates that the shift position module, the AC amp, and the AV COM signals are working.

Being that the REVERSE SIGNAL value did NOT change indicates that there is a issue either with the BACKUP RELAY or a wiring issue.

When you put the car in REVERSE, a 12V signal is sent FROM pin 5 on the BACKUP RELAY TO pin #81at the AV unit. This is what switches the CAMERA on and switches the display image:


This same signal is sent to the rear backup lights which illuminates the bulbs:
I know you mentioned you replaced the relay. Make sure you are working on the correct relay- there are 2 or 3 relays in that same location!

I would double check just to make sure that the M69 relay is getting 12V+ at pin #1 (red wire), and pin #2 (white wire) is grounded (this ground signal comes from the TCU (Transmission Control Unit) so you may need to check that the TCU connector is clean and tight).

If it were me, with the car running, I would run a small jumper wire from a good ground source (bare metal) and momentarily touch pin #2 at the relay and see what happens.

I hope some of this makes sense...

Stealthee, the relay for the backup lamps is behind the clock panel on the center stack... go figure...

For a pic of the SHIFT POSITION MODULE, check this thread. Just for reference.

 

Wow it's amazing how much knowledge there is out there. Thanks guys for the great inputs.

ILM-NC you might actually be right, when I removed the clock panel, I wanted to remove as little as possible to not mess anything up. It was really tight in there and without removing the stereo, I could only see one relay to the right of it and replaced it (see the attachment)


I will remove the stereo when I get a chance to see if I can get a better look and let you know how it goes.

 

It is the most idiotic location for relays to be placed. Makes troubleshooting a real pain.

Most G37's have 3 slots for relays in that spot: one for the backup relay, one for the rear defogger, and one empty/unused slot. I know when I had to install the relay and wiring for my heated steering wheel swap it was supposed to go there- I installed it elsewhere, I was not going through all that nonsense, but that's a different topic.

Again, with the KEY ON/ENGINE OFF, just verify:
1) 12V+ at pins #1 and #3;
2) check for GROUND at pin #2;
In PARK, this circuit should be open- ie. NO ground signal; when you place the shifter in REVERSE, pin #2 should have continuity/GROUND signal and the relay should "click."

If the relay does not click, run a jumper wire from a good ground point (any bare metal) and momentarily touch pin #2. If the relay still does NOT click it is likely bad. If the relay DOES click (and the rear lights come on) then the TCU is not sending the signal to the relay (pin #2).

Good luck!

 

Wow what a morning I had today! So what I did:

1) Removed the stereo to see if there were any other relays, but could not find anyone else (see pic). So I'm not sure if the one and only is the legendary M69 or not.


2)I disconnected the relay a tiny bit to expose the pins but still have it connected and then touched pin #2 with ground (I hope this is how you intended me to do). I got a initial spark but no click.

3) I disconnected the relay and gave it 12V and it clicks.

4) Did some MacGyver stuff, did not have a multimeter so I connected a 12v Led to pin 1 and ground and it worked. Connected to pin 3 and ground and it did NOT work.

5) So then the idiot in me woke up and I started doing some stupid things like running a wire from the + of the battery to pin 3 to se if it will work and it did not help. I actually touched some. Metal by accident and blew the cluster fuse. Thankfully I changed it and it works now but for some reason the TPMS light blinks now, hopefully I didn't mess something up.

So I'm kind of fed up with this now, I dont know what to do know. Is there anyway I can hotwire it to a button I can push when I want the lights and camera to work? That seems to be the easiest thing to do now.

Sorry for the long post! ​​​​​
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Young-G, where are you located? I'm beginning to wonder if your car is not US-spec. If so, the wiring might be A LOT different...

There should be at least two (3 depending on options)...

unless you don't have a rear defogger?
Just make sure that there is not a relay, or unused socket, hidden behind all that plastic:

We must identify that you are working on the correct relay, M69:
Remove the relay.
Let me know what the 4 wire colors are, especially for Pin #5.

Once we identify/verify relay M69, then, yes, we can wire in a bypass switch if you desire.

When you bought the car, did it always have this problem? Have you done any modifications?

Just trying to wrap my head around this issue...