Door lock switches will unlock but not lock

Door Lock System Components
The power door lock system consists of the following components:
• Driver door module (DDM)
• Passenger door module (PDM)
• Door lock relay--Located in the instrument panel (I/P) fuse block and controls the locking of the rear doors.
• Door unlock relay--Located in the I/P fuse block and controls the unlocking of the rear doors
• Body control module (BCM)
• IP BEC
• Reversible door lock actuators in each door

Driver and Passenger Lock System Operation
The front power door lock switches are integral components of the driver door module (DDM) and passenger door module (PDM). The switches are two-position normally open rocker switches. When placed in either the lock or unlock positions, the switches provide a direct input to the DDM or PDM. The DDM or PDM monitor these inputs and send a LAN message indicating a change in the switch position. Modules, that activate the power door lock motors, receive the LAN message and activate the motor in the appropriate direction to lock or unlock the vehicle doors. The body control module (BCM) upon receipt of a lock or unlock signal will control the rear door lock or unlock relays and also send a LAN message to the DDM and PDM to perform the commanded function.
The modules that activate the power door lock motors are:
• DDM (driver door lock actuator)
• PDM (passenger front door lock actuator)
• BCM (both rear door lock actuators)
The DDM and PDM are directly connected to the respective door lock actuator through the door lock motor lock and unlock circuits. Once a door lock or unlock request has been received, the module will supply battery voltage to one side of the actuator and ground the other, causing the doors to lock or unlock.
The rear passenger doors are controlled by the BCM through the rear door lock/unlock relay which is incorporated onto the printed circuit board in the LH BEC. The BCM controls the unlock relay by providing ground to energize the coil and controls the lock relay by providing battery voltage to energize the relay coil. This energizes the relay and allows voltage to be applied to either the door lock motor lock or unlock circuits. Since the other side of the door lock actuator is connected to the normally closed contacts of the opposing relay to ground, the doors lock or unlock.

Hi. Try : unlock the car ( push open 3 times) open doors from outside ( make sure they unlocked) switch child lock to lock position and back to open. Pull again on the handle after you switch before you close the door. Let me know if it helped.

I unlocked all doors, trans in park and it seemed to stay shut.

if you talking about door latch wont let door close.try to reset all door locks.first if you cant get door close.work unlock button with remote or door switch.then hold open door handle while you flat screw driver pull up latch in door latch should stay up so door will close.once get door close.try resetting all door locks by sitting inside vechicle with all doors close.remove key from ignition.open drivers door.wait 24 seconds.turn ignition switch on and back to lock position 3 times.press and release drivers door courtesy light 3 times.ensure doors lock and unlock.if not wait 40 seconds and repeat procedure.if this procedure fails. you have problem in the door latch and lock mechanism inside the door itself.

I have seen this and it was caused by a defective switch on the door.

inside the mechanical lock (The part that actualy holds the door shut when you close it) there is a switch that informs the control unit that the lock is either locked or unlocked.
These switches fail sometimes, when this happens the control unit is not aware that you have opened the door, and therefor will not wind the window down slightly.
The switch is integral with the lock unit, and they are not easy things to replace either.

Check the alignment with the door pin. Might be out of adjustment and will not let the door close all the way. That will cause the lock to not be operable. Good luck and have a great day.

A switch opens the door when you use the central locking system. If the door fails to open or close, this switch has probably gotten detached or the locking mechanism is damaged.
To find the problem and fix it-pull apart the door panel and feel for a thin rod connected to the locking mechanism.
This will help you pinpoint the issue and then fix it.

Program your factory keyless entry functions
For 2001+ Tacomas equipped with a factory alarm or keyless entry, here are some programming options that allow you to adjust the way your locks work.
The first programming option allows you to set the entry unlock to: (A) unlock the driver door with one push, and the remaining doors with a second push OR (B) unlock all of the doors with a single push.

• Open the driver's door. Remove the key from the ignition switch.
  
• (Complete these steps within 40 seconds)
  
  1. Insert the key into and remove it from the ignition switch 2 times.
     (IN - OUT - IN - OUT)
     
  2. Close, then open the driver's door 2 times.
     (SHUT - OPEN - SHUT - OPEN)
     
  3. Insert the key into and remove it from the ignition switch 1 time.
     (IN - OUT)
     
  4. Close, then open the driver's door 2 times.
     (SHUT - OPEN - SHUT - OPEN)
     
  5. Insert the key into the ignition switch and leave it in.
     
  6. Close the driver's door.
     
  7. Turn the key from LOCK to ON 4 times, ending at LOCK
     (LOCK - ON - LOCK - ON - LOCK - ON - LOCK - ON - LOCK)
     
  8. Wait for the locks to stop, then remove the key from the ignition switch.
     
• On the key fob, press and release both LOCK and UNLOCK buttons at the same time.
  
  1. [For all doors unlock] press and release the UNLOCK button.
     
  2. [For driver door unlock] press and release the LOCK button.
     
• Open the driver's door. The programming is complete. If programming did not occur, start over.