Toyota TACOMA 2010 Quick Reference Manual page 56

Locking the front doors from the outside without a key
Move the inside door lock button to the lock position.
Close the door.
Vehicles with power door lock system
The door cannot be locked if a front door is open and the key is in
the engine switch.
Rear door child-protector lock (Double Cab models only)
■
Key reminder buzzer
A buzzer sounds if the driver's door is opened, while the engine switch is in
the ACC or LOCK position to remind you to remove the key.
1-2. Opening, closing and locking the doors
The door cannot be opened from
inside the vehicle when the locks
are set.
These locks can be set to prevent
children from opening the rear
doors. Push down on each rear
door switch to lock both rear
doors.
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