You'll find the chime module under the dash, it can be unplugged to stop the chime, yours has probably died.
Try replacing it.
I dont exactly know where it is located under the dash.
Thats what a workshop manual is for ; )
December, 23, 2006 AT 2:04 PM
I have the same problem. No warning chime for lights on, key in ignition, etc.
Everything points to the Smart Entrance Control Unit (I guess that is the $700 module). However, when I took it to the dealer they pointed to behind the dash to fix the problem (investigate more) and that would be 2 hours of labor.
If there is a little buzzer/chime back there outside of the SECU it isn't well documented in the manual.
December, 23, 2006 AT 2:11 PM
The shop manual for Nissan Pathfinder 1998, page EL-252, states the following: Warning Chime (located in Smart entrance control unit).