The door chime sounds when the key is out of the ignition when the driver side door is open. It also sounds when the key is in the ignition and the driver side door is open. If the switch in the door frame is manually pressed in the chime stops sounding. It is a 2007 Nissan Titan crew cab 2WD 5.6 V8 with an Auto transmission.
I wish to fix the condition where the door open chime sounds when the key is out of the ignition switch. Otherwise, every thing seems to be working fine.
Do I need to replace the ignition cylinder,or is there a less expensive fix?
Door Chime Sounds
It sounds to me like you have pretty much figured it out. You are headed in the right direction with your diagnosis. The key and tumbler may not need to be replaced but you will need to dig into it for sure. You may find some poor contacts that may be able to be fixed without replacement.