89 Drivers Door Ajar

[sosuzguy]

Hi, my Reatta has started giving me the error code Door Ajar but yet I can open and close the door and it will turn the interior lights on and off.  Is there just one door open sensor?  Thanks

[KDirk]

There are two switches involved on each door. There is a plunger type switch on the forward door frame that controls the courtesy lights and is "on" with the door open (plunger out). The door ajar detection is done by a switch that is attached to the latch assembly  within the door, this is mounted in the door shell with three torx head bolts on the back facing send or the door. It is supposed to make and break with the latch being closed or open. 

 

Either this switch is bad, the wiring associated with it is shorted or open, or the passenger door ajar switch input on the BCM is bad. Most likely is a failed switch. I do have extras if needed. Diagnostics probably will not shed any light as it simply reports the state of the switch input as read by the BCM, so any of the three above fault modes will trigger the same readout from the BCM input test for the passenger door.

[sosuzguy]

Thank Kevin, I will message you.