We went through this in the new-model introduction class, but it's of
course been long enough since then that I don't remember what the
mechanism is.  In my experience, the PSD (power sliding door) stops as
soon as the fuel door is released and will not operate if the fuel door is
already open.  Let's see what we can find in the class materials.

<thumbs through class binder>

Okay.  I've found a page which had a partially covered data screen which
appears to indicate that there is a data point in the PSD module for the
fuel filler door.  Of course, since it's partially covered with another
picture, I can't be sure.  So lets have a look at the schematics.

<visits www.hmaservice.com>

Found the page with the left PSD schematic.  It shows an input from a
"fuel filler door check switch."  But since they've updated hmaservice, I
can't find the link to component locations anymore.  I checked the right
PSD schematic, and there is no such input, so I figure we're on the right
track.

<grabs schematic book with actual pictures>

According to photo 56, this connector for the switch is accessed by
removing the left rear trim panel and is just behind the PSD, about 6 to
10 inches up from the floor.  The picture of a low enough zoom that I
cannot tell whether it's inside the body panel or accessible once the trim
is removed.  For comparision, I looked at photo 58, which shows the
connector for the fuel filler door solenoid, and that's back near the
motor for the PSD.  

It definitely appears safe to say that the left PSD module receives ground
input from the fuel filler door switch when the door in one state or the
other. It's not clear whether opening is inhibited with the switch
providing ground or with the switch open, but you can probably play around
with it and figure it out.

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