Code Entry as Follows:

Switch Radio On - Display Shows
" SAFE "
Press and Hold "SCAN" and "RDS"
The display will now show " 1000 "
Press preset " 1 " repeatedly for 1st Digit
Press preset " 2 " repeatedly for 2nd Digit
Press preset " 3 " repeatedly for 3rd Digit
Press preset " 4 " repeatedly for 4th Digit
If the correct code number is now shown
Press and Hold "SCAN" and "RDS"
And the Radio will then turn On