Code Entry as Follows:

Switch Radio On - Display Shows
" Please Input Code ! "
Rotate RH Tuning Knob to Select 1st Digit
Press RH Tuning Knob to Enter
Rotate RH Tuning Knob to Select 2nd Digit
Press RH Tuning Knob to Enter
Rotate RH Tuning Knob to Select 3rd Digit
Press RH Tuning Knob to Enter
Rotate RH Tuning Knob to Select 4th Digit
Press RH Tuning Knob to Enter
If the correct code number is now shown
Rotate RH Tuning Knob To Select " OK "
Press RH Tuning Knob to Enter