"The EPBS will compare the system security code with the code entered on the E-Configurator. If the code matches, you will have an opportunity to change the code. Press NO to continue on without any change. Press YES if you want to change to a new security code at this time. Entering a new code uses the same technique just described, using the Left/Right and Down keys. It is necessary to use a security code different from the default AAAA. Failure to change the code will cause a periodic message to play – “CHANGE PASSWORD”."

they just didn't RTFM and that password is still set to AAAA