p18 of the manual...
To unlock ALL the doors:
1. Enter the vehicle & close all doors
2. Fasten seat belt.
3. Place key into ignition
4. Turn ignition to the ON position, w/o starting engine.
5. Press & hold UNLOCK button on FOB.
6. Continue to hold UNLOCK button for at leat 4 seconds, but no more than 10 seconds, then press and hold LOCK button.
7. When single chime is heard, release both buttons.
8. Turn ignition OFF and wait 60 seconds.
9. Repeat above steps to revert to previous setting.
To disable "horn chirp": 1. -4. as above.
5. Press and hold LOCK on FOB.
6. Continue to hold LOCK button for at leat 4 seconds, but no more than 10 seconds, then press and hold UNLOCK button.
7. -9. as above
Good luck

Alain