'94 E36 Double Lock Trouble

You are _supposed_ to be able to lock and unlock the doors by using the key in the trunk lid.
My car ONLY does this if I do not open and close the doors first. I can
cycle the ignition by reaching through the window, adn then the trunk lock will operate the remaining locks on the car. Unfortunately, one would normally turn the ignition off, open the door to get out, close the door, then go to the trunk and do stuff, and lock the car when finished.
Actually, my car locks the doors from the trunk lock, but it only unlocks them from the doors. I cannot unlock the doors from the trunk lock UNLESS I get out of the car when I park it without opening the door.
I can LOCK the car from the trunk lock no matter how I get out of the car, but I can only UNLOCK the car from the trunk lock if I climb out through a window -- on my car, this is not all that difficult because I have a convertible, but it can't be right.
If I climb out the window and lock the doors so that I can unlock them from the trunk lock, then the Ignition Bypass circuit is disabled. It seems that the door has to be opened and closed for the Ignition Bypass circuit to be activated when the doors are locked. Since climbing out a window is not a rational thing to do, then the ignition bypass works fine, but the doors do not unlock from the trunk lock. I can't approach the car with packages and put them in the trunk, then open the doors because they are already unlocked -- I have to unlock the the trunk then unlock the doors, or unlock the doors and the trunk unlocks automatically.
The mechanism in the trunk works right, so I think the central locking module must be hosed up somehow. If the doors remain closed, the trunk will lock and unlock the doors, but if the doors are opened then closed, the truck will lock but not unlock the doors.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Jeff Strickland wrote:

Dump it in a river and buy a Kia - they have remote keyless entry.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Kia? Ain't happening. My locks work fine, if I don't open the doors first. Actually, my locks work fine, it's the unlocking that gives me trouble.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Seems a fair guess. Presumably it did once work correctly? Are there any aftermarket bits fitted like an alarm or immobiliser? But the first thing I'd try would be to clean the controller connector. After that replace it - shouldn't be too difficult to get a used one.
--
*Stable Relationships Are For Horses. *

Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
wrote:

No accessory items, such as alarm. BMWs have factory installed immobilizers, so no need to add one.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Had something similar on a Cavalier many years ago.
One of the switches was faulty meaning it was on all the time. Certainly sounds like a duff switch / connection somewhere - my guess on the driver's door (what happens if you exit passenger side?)
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Same thing ...
The car does not care which door is used to exit. Any door (there are only two of them) that is opened then closed after turning the ignition to off will defeat the trunk lock's ability to unlock the doors.
I can turn the ignition off, pull the key and use it to lock the door and trunk, then take the key to the trunk to unlock the door. If I was actually driving the car, then I'd turn the ignition off, open the door and get out, close the door and lock it -- or go to the trunk and lock the car from there. Upon returnig to the car, the trunk will not unlock the rest of the car.
Whatever the problem is, it's in the logic not the physical parts.
PS I can open the door, then turn the ignition off, and the unlocking from the trunk still fails.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.