Hi, as previously stated, my horn no longer sounds when I set the alarm/lock my doors using the remote. I HAVE already tried pressing the lock/unlock buttons simultaneously and this DID NOT resolve the problem. Any other ideas/suggestions/possible resolutions??? Thanks in advance! (2012 G37 S) Side note: I spoke with my service advisor at Austin Infiniti who also suggested the "button thing". When I told him that did not solve the problem I got no reply.......interesting......My extended warranty is due to expire in a couple of months so ANYTHING, or any work rather, that I can get completed before then is obviously on the top of my list of to-do's. If anyone has any suggestions or recommendations as far as things I should possibly have looked over before my warranty expires, feel free to chime in! Cheers!

 

The FSM is here:
https://nicoclub.com/FSM/G37/Sedan/2012/HRN.pdf
Are you able to honk the horn manually?
It looks like there are 4 fuses and 2 relays involved in the horn circuit (plus the ground which, if you lost that, would stop all sound). Fuses #31 and 38, plus one of the horn relays, are located on the Fusible Link which is hanging off the positive post of your battery. Fuses #50 & 51 are at the bottom left of your IPDM - not very handy.

 

hold down on key fob lock and unlock at same time lights will flash and car will honk

 

I remember a thread several months ago that mentioned this is one of several optional settings that can be made through the control center.

 

Per the FSM:

**NOTE: IMAGE IS FOR 2008MY, 2012MY IS SIMILAR**

If this does NOT work, and assuming your horn functions normally otherwise, then there is a issue somewhere between the BCM and the IPDM/er.