I've recently noticed a small puddle of water of that corner of the car. Since my wife is out with the car right now, can't look underneath. Does the a/c condensation drain there too?

 

Without having a service manual in front of me, I would find it unlikely that the A/C has a drain line going all the way back there. Many of the sedans (including my '98 GS400) have sunroof drain lines that empty behind the rear wheels. Is that where you are seeing the water?

 

Pardon me, my intention is not to knit pick here, but things on the net have a history of their own. Just in case some is mislead, the drain form the A/C is through a tube and it drains some where close to the front passenger foot well. If the drain is blocked, then the condensate overflows and drips down from the heat-exchange unit and makes it way to the passenger side.

Salim