General Description Concerning Central Door Locking System

GENERAL DESCRIPTION CONCERNING CENTRAL DOOR LOCKING SYSTEM

The following ECUs affect the functions and control of the central door locking system.






CENTRAL DOOR LOCKING SYSTEM

DOOR LOCKING OR UNLOCKING BY OPERATING THE DRIVER'S OR PASSENGER'S DOOR LOCK SWITCH





When the door is locked by the driver's or passenger's door lock switch, the ETACS-ECU operates its door lock relay and passes a current through the door lock actuators of all doors for 0.25 second to lock all doors.
When the door is unlocked by the driver's or passenger's door lock switch, the ETACS-ECU operates its door unlock relay and passes a current through the door lock actuators of all doors for 0.25 second to unlock all doors.
When the door is locked and unlocked by driver's or passenger's door lock switch consecutively, the ETACS-ECU operates its door lock relay and passes a current through the door lock actuators of all doors for 0.25 second to lock all doors. Then, the ETACS-ECU operates its door unlock relay and passes a current through the door lock actuators of all doors for 0.25 second to unlock all doors. Due to this, there may be a time lag between the driver's or passenger's door lock switch actuation and the time when all doors are unlocked.

Forgotten key prevention function

If the driver's door is locked while it is open





If the driver's door is locked while it is open and when the key is still in the ignition key cylinder, approximately 0.3 second later the ETACS-ECU activates the unlock relay output for 0.25 second to prevent the door from being locked with the key inside the vehicle.
In addition, if locking the door was not prevented, a re-try current is sent (an unlock relay output ON is sent for 0.25 second up to 5 times including the first attempt).
NOTE:
The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.

If the passenger's door is open when it is locked with the driver's door switch





If the passenger's door or driver's door are locked while the passenger's door is open and when the key is still in the ignition key cylinder, approximately 0.3 second later the ETACS-ECU activates the unlock relay output for 0.25 second to prevent the door from being locked with the key inside the vehicle.
In addition, if locking the door was not prevented, a re-try current is sent (an unlock relay output ON is sent for 0.25 second up to 5 times including the first attempt).
NOTE:
The dotted line indicates that the system is trying to turn on the unlock relay if the door cannot be unlocked.