I used this kit on Saturday and the draining fluid looked a little yellow, just like in the photo above. There was a strong ammonia smell from the foam, so I think it is meant to be only an antimicrobial agent for treating musty smells.
The second can, which one is instructed to spray 45 seconds during three different vent settings, only lasted for two 45 second bursts. Reduce the spray time to 30 seconds if you want to use it for all three vent positions.
This kit completely eliminated the musty smell from my AC system. For how long? We'll see.
Here's Toyota's video on how to use the two can kit:
YouTube