Doors: Description and Operation

ENGINE HOOD / DOOR: DOOR CLOSER SYSTEM: SYSTEM DIAGRAM









Communication table:









SYSTEM DESCRIPTION

1. GENERAL

Position detection switches are enclosed in the door closer mechanism in each of the front and rear doors lock assemblies to detect whether the front and rear doors are open, closed, or ajar. If a detection signal that indicates that front and rear doors are ajar is transmitted to the door ECU, the door ECU actuates the door closer motor in order to fully close the front and rear doors.

The door may or may not stop momentarily during the closer motor operation depending on the position of the door when the closer operation starts.

In this system, each door is independently controlled by the door ECU that is provided in each door. The door ECUs maintain communication via the CAN.

A mechanical cancel mechanism is provided to enable the opening of the front and rear doors by operating either the outside or inside door handle while the door closer system is operating. Through the function of the link and the lever that move together with the movement of the handle when either the outside or inside door handle is operated, the mechanical cancel mechanism cuts off the transmission of the power from the motor in order to disable the operation of the door closer system, thus enabling the door to be opened.

If the operation of the door closer system is not completed within approximately 3 seconds due to the jamming of a foreign object, the door ECU detects a malfunction and stops the current that is supplied to the motor.

2. FUNCTION OF MAIN COMPONENTS





3. CONSTRUCTION AND OPERATION

(a) Door Closer:

The door closer consists of a door lock mechanism that performs door lock control and a closer mechanism that performs door closer control. In addition, the door closer contains a pawl switch, Half/full-latch switch, closer stop switch, closer position switch, outside handle switch, closer motor, and door lock motor.

(b) Door ECU:

(1) General

In the door closer system, the transition of the door from the open state to the ajar state is detected by the door ECU. The ECU then actuates the closer motor to rotate the latch in order to fully close the door. This ECU, which is provided in each of the doors, independently controls the respective door. The door ECUs maintain communication via the CAN.

(2) Normal operation:

The timing chart below shows the basic operation of the door closer system.





(3) Closer operation when stopped due to handle switch being pulled:





(4) Normal operation when a door stops momentarily:





(5) During normal operation when a door does not stop momentarily:





(6) Fail-safe

The door ECU stops the system if it detects a malfunction in the system. However, the doors can be opened or closed manually even if the closer system is not operating.