We have a 2010 Lexus GX460 and the door ajar light won't go off. The chime stays on and we had to manually turn off the dome light. Even with the engine off the light stays on the dashboard.

most cars IT is deep in the IP cluster
only the SM service manual shows this.
door AJAR CHIME
THE DOOR OPENS AND DOOR CPU SENDS THIS
DATA FACT TO THE CLUSTER, (ON THE MX DATA NETWORK AND THE CLUSTER CHIMES.
if the chime is bad say so? we can not guess goals.
or too loud or what?

here it is

did you RTM read the operators guide yet,
it tells you why all beeps beep and what lamps flash, (warning) and why. did you?
you turn on, the head lights, (what about 1st click , parking lights"?)
and does the dash cluster, show warnings of any kind?

if a door is ajar the system will think, you are exiting veh. with lights on and tell you, buy beeping ,etc.
but on my jeep it says on the dash DOOR, or on EVICs, (not yours)
the newer car even tells what door IS AJAR.
mine on shows , "DOOR"
the operator guide will say, check all doors for ajar, and get warning clear before driving....etc.

if you lost the guide here it is for free

http://justgivemethedamnmanual.com/jeep/jeep-wrangler-owners-manuals/

click the 05 link
ignore beeps, there are just too many .. i look at the cluster and learn to read it..
my newer jeep 08 can produce 1000s of errors,,,,, possible.
in fact the intent it to beep to tell the driver to look at the cluster
for in depth, causes.
see chapter starting on page 136'

once sound it makes is Check gauges chime. so check them.
and headlamps left on
and door ajar.

page 63
NOTE: If the driver's door is left open, and the headlights
or parking lights are left on, the "High Beam
Indicator Light" will flash and a chime will sound.
Lights-On Reminder
If the headlights or parking lights are on after the ignition
is turned off, a chime will sound when the driver's door

its a crude system, and evolved to complex in 2007.
"DOOR" or RF-door , on mine.
or

NOTE: A tone will chime if the turn signals are left on
for more than 1 mile (2 km).

search manual for
"chime will sound"

Looking at the engine left side

There is a tiny switch inside the door called the "Door Ajar" sensor, remove the door panel and replace that switch, it is attached to the door latch, it just twists out and back in.

It sounds like a door ajar switch is broken. The door switches are located in the door on the latch mechanism. To get to it you will need to remove the door trim panel to gain access to the door latch.

The switch is available for around $20 - autozone part number SW1979 or SW3688

in the door jam there is a switch it sounds like the switch either needs to be adjusted or replaced to adjust loosen the big flat screw at the bottom and turn the switch to acheive the right height. if it is at the correct height then try a new switch. this should solve that problem if not then you have me stumped also.

To temporarily solve the light problem, I taped a washer to the inside of the door where the door hits the plunger on the light switch. A permanent solution would be to drill a hole in the door at this spot and put a self taping screw in that will trigger the switch sooner. I figured out the reason the dome light stayed on is due to the courtesy light timer and the lights would have eventually gone off.

The door sensors will need to be replaced. A screws can be removed and then a wire can be taken of and you then can replace the switch.

it sounds like a bad door switch, does the dome light stay on also? if so, it is a bad door switch.it is also possable the switch is adjustable and you can try each of them individualy by pushing in the tab in the door jam that looks like a "turkey timer" (but it is black)..good luck, marty

The door ajar switch on the side of the dash needs to hit the door panel to shut off the chime and dome light.Pull the switch from the dash and unplug it.