Latch operating system and instruction method

A method for authorizing a user to enter a side door in a vehicle having a rear closure, comprising:

• providing the side door with a side door latch having a side door electric actuator energizable to unlatch the side door latch;
• providing the side door with a user operated switch;
• providing the rear closure with a rear closure latch that is unlatched by either a key operated lock cylinder operable by a properly bitted key or by energization of an rear closure electric actuator, said rear closure latch having one or more switches operable by the unlatching of the rear closure latch;
• providing a wireless fob for transmitting a first radio signal indicating that a user is authorized to unlatch the side door latch and a second radio signal indicating that eh user is authorized to unlatch the rear closure latch;
• monitoring the transmission of the first and second radio signals;
• monitoring the one or more switches of the rear closure latch to determine that the rear closure latch has been unlatched;
• monitoring the status of the handle switch;
• and if the rear closure latch has been unlatched without the transmission of the second radio signal, then calculating that the key was used and the user must therefore be authorized;
• and upon the operation of the user operated switch on the side door, energizing the electric actuator of the side door latch to permit user entry through the side door.

A method for authorizing a user to enter a side door in a vehicle having a rear closure, comprising:

• providing the side door with a side door latch having an side door electric actuator energizable to unlatch the side door latch;
• providing the rear closure with a rear closure latch that is unlatched by either a key operated lock cylinder operable by a properly bitted key or by energization of a rear closure electric actuator;
• providing a wireless fob for transmitting a first radio signal indicating that a user is authorized to unlatch the side door latch and a second radio signal indicating that the user is authorized to unlatch the rear closure latch;
• providing a control module for:
• monitoring the transmission of the first and second radio signals,
• for enabling the energization of the side door electric actuator and the rear closure latch,
• and for monitoring one or more switches on the rear closure latch to determine that the rear closure latch has been unlatched;
• and if the control module determines that the rear closure latch has been unlatched without the control module having enabled the energization of the rear closure latch, then calculating that the key was used and the user must therefore be authorized;
• and enabling the energization of the electric actuator of the side door latch to permit entry through the side door.