Power Locks: Description and Operation
CENTRAL DOOR LOCKING SYSTEMCentral door locking system operation
- When the driver's inside lock knob is locked, the lock relay inside the ETACS-ECU turns on to lock all doors. However, even if the driver's inside lock knob is unlocked, all the doors are not unlocked.
- With all the doors locked, turning the key in the driver's door lock key cylinder unlocks the door. Turning it again makes the door unlock relay close to send a signal for unlocking all doors. When the key in the front passenger's door lock key cylinder is operated, the lock or unlock relay inside the ETACS-ECU is turned on to lock or unlock all doors.
- When the door lock switch (built into the power window switch) is operated, the lock or unlock relay inside the ETACS-ECU is turned on to lock or unlock all doors.
Forgotten key prevention function
- If the driver's door is open (door switch turned ON), when the key is inserted in the ignition switch (key reminder switch turned OFF), the ETACS-ECU activates the door unlock relay for 0.25 seconds to prevent the door from being locked.
- If you try to lock either the driver's or passenger's door when the passenger's door is open (door switch turned ON) and the key is inserted in the ignition switch (key reminder switch turned OFF), the ETACS-ECU prevents the doors from being locked by activating the door unlock relay for 0.25 seconds.
GENERAL DESCRIPTION CONCERNING CENTRAL DOOR LOCKING SYSTEM
The above ECUs affect the functions and control of the central door locking system.
Door lock function
Operating the driver's or front passenger's door lock key cylinder
When you insert the ignition key to the driver's or front passenger's door lock key cylinder and turn the key clockwise to lock the door, the ETACS-ECU energizes its door lock relay for 0.25 second to activate all the door lock actuators. Then all the doors will be locked.
Operating the driver's or front passenger's door lock switch
When the door is locked by driver's or front passenger's door lock switch, the ETACS-ECU energizes its door lock relay for 0.25 second to activate all the door lock actuators. Then all the doors will be locked.
Operating the driver's door inside lock knob
When the door is locked by driver's door inside lock knob, the ETACS-ECU energizes its door lock relay for 0.25 second to activate all the door lock actuators. Then all the doors will be locked.
Door unlock function
Operating the driver's door lock key cylinder
When you insert the ignition key to the driver's door lock key cylinder and turn the key counterclockwise to unlock the door, the ETACS-ECU energizes its door unlock relay for 0.25 second to activate only the driver's door lock actuator. Then only the driver's door will be unlocked.
When you turn the key counterclockwise again, the ETACS-ECU energizes its door unlock relay for 0.25 second to activate all the door lock actuator. Then all the doors will be unlocked.
Operating the front passenger's door lock key cylinder
When you insert the ignition key to the front passenger's door lock key cylinder and turn the key counterclockwise to unlock the door, the ETACS-ECU energizes its door unlock relay for 0.25 second to activate all the door lock actuators. Then all the doors will be unlocked.
Operating the driver's or front passenger's door lock switch
When the door is unlocked by driver's or front passenger's door lock switch, the ETACS-ECU energizes its door unlock relay for 0.25 second to activate all the door lock actuators. Then all the doors will be unlocked.
Forgotten Key Prevention Function
If the driver's door is opened with the ignition key inserted in the ignition key cylinder and then locked (i.e., the unlock switch integrated in the driver's door lock actuator is off, and the lock switch is on), the ETACS-ECU turns on the unlock relay for 0.25 second after approximately 0.3 second. This prevents the door from being locked unintentionally. If the system fails to unlock the door, the ETACS-ECU try to turn on the unlock relay five times in maximum for 0.25 second every one second.