The battery is disconnected and reconnected for Renault vehicle.
When the radio is protected by a four digit code.
If you don't remember radio code, you need this App for calculator radio code via pre-code security.

Input Code Guide:

1. With a Steering Wheel Remote Control:

Press the [ ¬] button then rotate the thumb wheel for 1st digit
Press the [ ¬] button then rotate the thumb wheel for 2nd digit
Press the [ ¬] button then rotate the thumb wheel for 3rd digit
Press the [ ¬] button then rotate the thumb wheel for 3rd digit
Shown on screen if code correct, press and hold the [ ¬] button to store the code (10 seconds)

2. With Preset Buttons On Radio:

Press 1 Button repeatedly for 1st digit to be displayed
Press 2 Button repeatedly for 2nd digit to be displayed
Press 3 Button repeatedly for 3rd digit to be displayed
Press 4 Button repeatedly for 4th digit to be displayed
Press and HOLD Preset button 6 (or 5) to store your code (10 seconds)

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