Power Locks: Description and Operation

SYSTEM OUTLINE

1. MANUAL UNLOCK OPERATION
When the door look control SW on the driver or front passenger seat is pressed to the unlock position, the signal is input to TERMINAL MUL of the driver door ECU or front passenger door ECU. Through communication control of the body ECU and door ECU etc., the current flows from TERMINAL A- of the door ECU into the door lock motor to TERMINAL A+ of the door ECU to GROUND, to unlock the door.

2. MANUAL LOCK OPERATION
When the door lock control SW on the driver or front passenger seat is pressed to LOCK, signal is input to TERMINAL ML of the driver door ECU or front passenger door ECU. Through communication control of the body ECU and door ECU etc., current flows from TERMINAL A+ of the door ECU to door lock motor to TERMINAL A- of the door ECU to GROUND, to lock the door.

3. DOOR KEY UNLOCK OPERATION

Unlock operation from driver door
When the door is unlocked once by the ignition key from the driver side, the signal from the door key lock and unlock SW in the door lock motor front LH is input to TERMINAL KUL of the driver door ECU. This signal activates the driver door ECU to flow the current from TERMINAL A- of the driver door ECU into the door lock motor front LH to TERMINAL A+ of the driver door ECU to GROUND, to unlock only the driver door. Accordingly, if the second unlock operation is made within 3 sec. after the above unlock operation, all the doors are unlocked through communication control of the body ECU and door ECU etc.

Unlock operation from passenger door
When the door is unlocked by the ignition key from the front passenger side, the signal from the door key lock and unlock SW in the door lock motor front RH is input to TERMINAL KUL of the front passenger door ECU. Through communication control of the body ECU and door ECU etc., the current flows from TERMINAL A- of the door ECU into the door lock motor front RH to TERMINAL A+ of the door ECU to GROUND, to unlock all the doors at once.

4. IGNITION KEY REMINDER OPERATION
When the door lock operation is made using the door knob with the ignition key remained inserted in the key cylinder and the door open, unlock operation is automatically made. Additionally, if lock operation is made with the door lock control SW or door key lock and unlock SW, unlock operation is automatically made after the lock operation has been completed.