Method for controlling a system for a motor vehicle

A method for controlling a system for a motor vehicle, said system comprising:

• an actuator,
• a volatile memory (RAM) storing at least one item of actuator position information,
• a long-term memory (EPROM) storing:
• at least one item of actuator position information,
• information relating to a shutdown of the actuator, the information taking a first value when the system was shut down in a controlled manner and taking a second value when the system experienced a fault that caused the erasure of the current value of the position of the actuator stored in the volatile memory (RAM), when the system inadvertently stopped being supplied with electric power or communication between the system and a computer was disconnected,
• said method comprising:
• when the system is activated following shutdown, determining whether the position value stored in the long-term memory (EPROM) is considered to be correct on the basis of the shutdown information;
• when the position value is considered to be correct, using this value to command the actuator;
• when the position value is considered to be incorrect, determining a value of the position of the actuator before commanding the actuator again;
• and
• when the shutdown information is equal to the second value, then the position value stored in the long-term memory (EPROM) is considered to be incorrect, and the computer sends a position value of the actuator to the system.