Is this it? Common issue.
SRS Reset
This may be easier to follow:
It's actually in page 14 of the SRC.pdf file in the 2009 service manual. Here are the steps if you just want to reset the error without checking the code:
1. Turn the ignition from OFF to ON, you don't have to start the car for this. Just press the start button until it gets to the ON state, usually OFF > ACC > ON.
2. The airbag light should turn on, wait until it turns off (it should stay on for 7 secs and then turn off) and then turn the ignition to OFF within 1 second.
3. Wait more than 3 seconds after the ignition turns OFF.
4. Repeat steps 1 to 3, twice. (Total 3 times)
So total you're turning the ignition OFF to ON 3 times and then turn it on 1 more time. This time leave the car in the ON position until the light flashes, the car is now in diagnostic mode for the SRS system. Typically you'd now look in the service manual and count the flashes to see what error it was. I didn't bother and just cleared the error.
To clear the error simply turn the car to OFF again and wait more than a second. When you turn it ON again, the warning flashes should be gone.
From the service manual it looks like there's a specific error for if the Passenger airbag indicator light is malfunctioning. So basically don't turn on the car if you have that disconnected or else you'll have to reset it with these steps as even disconnecting the battery after that point doesn't clear it.