Can Toyota Prius traction control be turn off?

To disable traction control on the prius:

1) Turn the car to ignition by pressing START twice without pressing the brake.

2) Floor the gas pedal two times (two full top to bottom pressings)

3) Make sure the parking brake is on, and while pressing the brake pedal put the car into NEUTRAL

4) Again press the gas pedal two times

5) Push PARK and press the gas pedal two more times

6) Now put your foot on the BRAKE and press START one time while holding the brake down.

Added Note: Most Prius-specific sources that detail this procedure, also include a very clear disclaimer: WARNING: The shop manual apparently states in no uncertain terms that this procedure must NOT be used to drive the car as damage to the transmission could occur due to traction control being defeated. The mode is intended as a purely diagnostic function.