When you clear all MyKeys, you remove all restrictions and return all MyKeys to their original admin key status.
Switch the ignition on using an admin key.
To clear all MyKeys, use the information display controls on the steering wheel to select the following:

Menu Item   Action  
Settings
Press the menu button.  
MyKey
Press the OK button.  
Clear MyKeys
Press and hold the OK button until a confirmation message appears in the information display.