How to manually deactivate the anti-theft system on a Citroen C-Quatre?

[Bonnie]

Only by cracking the anti-theft password of the BSI. BSI is a general term for electronic control units: BSI is the electronic control unit of a car, a term for the car's computer. The BSI in the car's anti-theft system is the so-called anti-theft computer. Some car materials also label the engine control unit MCU and its corresponding peripheral circuits as BSI. Note: 1. There is only one way to activate the anti-theft system, which is by pressing the lock button on the remote control. Using the mechanical key to lock the car will not activate the anti-theft system. 2. There is only one way to deactivate the anti-theft system, which is by pressing the unlock button. Using the mechanical key to unlock the car will also trigger the anti-theft alarm. 3. In case the remote control fails, after opening the door with the mechanical key, inserting the key into the ignition and turning it to the power-on position can deactivate the alarm.