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.
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.
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.
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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