[s-cars] Door Lock/IR interaction. Does this make sense?

[Kirby Smith]

Franco Barber wrote:
> On Thu, Jan 27, 2005 at 10:35:12AM -0500, Joe Pizzimenti wrote:
> 
>>One can only conclude that the IR actuates the driver's door lock and
>>the others are slaves of the master.
>>
>>Joe
> 
> 
> I still don't think that's accurate for the 95-97 cars.
> For older cars, it's true that you could pull up on the driver's
> door lock and this would activate the other locks through a vacuum
> system, but it doesn't work that way on the 95-97.
> 
> I've seen the little green vacuum tubes that start at the central
> locking controller.  They start out under the rear seat and go out,
> teeing off every once in a while to head to different places.
> 
> Another possible explanation is that the driver's door
> lock failed was in such a way as to cause a vacuum leak, and
> thus the vacuum pump couldn't unlock the other doors.
> It would have to be a miracle leak that fixed itself later.
> Maybe condensation in a vacuum line froze, caused the line to
> expand and leak?
> 
> Franco
> 
Earlier cars (my experience only goes back to 1988, and is limited to 
sedans) all have vacuum lines from the central controller.  The lines 
are all in parallel, and locking or unlocking pneumatically is done 
together.

However, this doesn't prove that the IR system doesn't interact 
electrically with the driver's door pneumatic actuator status signal. 
In particular, if the driver's door doesn't open, it could be 
interpreted by the controller as having been immediately relocked, and 
the pneumatic drive to the other doors would be so brief as to be 
ineffective.  I'm not sure I want to test that theory on my S6 in this 
weather (-3F).

kirby