Enabling Theftlock(R)

The theft deterrent is enabled by the following sequence of operations.
1. With battery and ignition voltages applied and radio OFF.
2. Depress preset buttons 1 (REV) and 4.(NR or RDM) for 5 seconds. The VF display will show-indicating the unit is not in the secure mode.
3. Using the HR and MN buttons, enter any code number. The initial key press of either button will cause the display to indicate 000, the last three digits of the 3 1/2 digit user code. Subsequent key presses of the HR button will cause the left 1 1/2 digits to increment and depressing the MN will cause the right two digits to increment. The digits will continuously increment at a rate of once every 1 second for the first two increments and then once every 250 milliseconds, as long as the button is pressed. The digits will also increment by one with every momentary depression.
4. Depress the AM/FM button. The display will now show REP for 5 seconds, indicating that the steps to re-enter the 3 1/2 digit code will need to be repeated for verification.
5. Re-enter the 3 1/2 digit code according to step 2.
6. Depress the AM/FM button. If the display shows SEC, the verification was successful and the system is in the secure state. If the display shows--, the verification steps were not successful and the entire sequence must be started from the beginning.
The display will revert to TOD after 15 seconds.