Intermittent driver side door lock
Thread Starter
Instructor
Joined: May 2009
Posts: 118
Likes: 3
From: Waltham MA
Intermittent driver side door lock
It happens more and more often now that when I try to unlock the car with the key fob, the interior lights come on but the driver side door doesn't unlock. Hitting "unlock" again usually does the trick, and then both doors unlock.
I'm pretty sure the car knows unlock has been pressed (lights come on, and it counts this command towards the two needed for the passenger door unlock), but for some reason doesn't do it the first time around.
I'm wondering if there's a mechanical issue that requires repeated actuator efforts to overcome, since an electrical problem that manifests itself so repeatably seems pretty unlikely.
Any thoughts before I dig into my door?
I'm pretty sure the car knows unlock has been pressed (lights come on, and it counts this command towards the two needed for the passenger door unlock), but for some reason doesn't do it the first time around.
I'm wondering if there's a mechanical issue that requires repeated actuator efforts to overcome, since an electrical problem that manifests itself so repeatably seems pretty unlikely.
Any thoughts before I dig into my door?
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Pull your codes paying particular attention to the LDCM. Most likely you've got a bad relay in the door control module but it could also be a serial interface wiring issue in the doorjam connector.
Thread Starter
Instructor
Joined: May 2009
Posts: 118
Likes: 3
From: Waltham MA
No codes, absolutely nothing. And why would a bad relay or wiring always work on the 2nd try? If it was that, I'd expect it to either work or not - maybe until the car got warm, or cold, or vibrated, or...
That's why I was thinking mechanical.
That's why I was thinking mechanical.
Last edited by absolutscharf; May 15, 2012 at 10:28 AM.
6th Gear
Joined: Mar 2012
Posts: 6
Likes: 0
I had this problem with my '03 ZO6 and used a squirt of WD-40 in the keyhole. Work it a few times with the key inserted in the lock (careful the trunk might open). Then work the manual door lock from inside a few times. Haven't had the problem in over a year now.
