Question about 2001 Buick LeSabre

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Rear door lock will not lock or unlock

How to repair rear door lock


passenger side rear door will not unlock when car is put in park. It will unlock manually. Car is a 2001 Buick La Sabre Custom.
Thank You

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  • Anonymous Mar 16, 2014

    Key will not unlock either door

  • Anonymous Mar 21, 2014

    Ihave a 2001 Buick Lesabre. For awhile the rear door,(rs) would not unlock. Now it won't lock in any way. Any ideas?

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Sounds like that rear door lock will also not unlock with the switch either, correct ? It might lock , but not unlock. Door lock actuator needs to be replaced.

Posted on Apr 01, 2009

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Posted on Jan 02, 2017

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sofia2013.com/auto-repair-power-door-lock-troubleshooting/
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2005 Chevrolet Tahoe Power Windows and Power Locks not working.


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The power door lock system consists of the following components:
• The driver door module (DDM)
• The passenger door module (PDM)
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Programmable Automatic Door Locks
The automatic door lock feature can be programmed to control the door lock system. The automatic door lock feature is factory programmed to have all doors lock and unlock. For detailed instructions on programming the automatic door locks, refer to Vehicle Personalization in Personalization.
When the automatic door lock feature is programmed to control the door lock system, the driver door module (DDM), passenger door module (PDM) and body control module (BCM) will lock the vehicle doors if the following inputs are true:
• Ignition 1 input is active.
• All door jamb switch inputs are inactive.
• Cargo door or liftgate/liftglass ajar inputs are inactive.
• Transmission is shifted out of park.
This automatic door lock function will only occur once per ignition cycle unless, a door jamb switch input changes state to active and back to inactive. Then the DDM, PDM and BCM will lock all doors again.
Once the automatic door lock feature has locked the doors, the BCM will then unlock all the doors when the transmission is shifted into park.
Driver, Passenger and Cargo Door 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 monitors these inputs and sends a Class 2 message indicating a change in the switch's respective position. Modules which activate the power door lock motors receive the Class 2 message and activate the motor in the appropriate direction to lock or unlock the vehicle's doors and liftgate. The rear door lock switch provides a lock and unlock signal to the body control module (BCM). The BCM upon receipt of a lock or unlock signal will control the rear door lock relays and also send a Class 2 message to the DDM and PDM to perform the appropriate function.
The modules which activate the power lock motors are:
• The DDM (driver door lock actuator).
• The PDM (passenger front door lock actuator).
• The BCM (both rear door lock actuators and cargo door/liftgate).
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.
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Troubleshooting is required to inspect few parts.It can be issue with ignition switch.Its not getting off.Or issue with sensor or wiring.Or its faulty lock itself.Click the link below and follow the troubleshooting:----Driver Door will not lock or unlock with Key or Remote? http://whatisbyme.blogspot.in/2012/05/1998-toyota-landcruiser-driver-door.html
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Driver side door will not lock or unlock with Remote? http://technoanswers.blogspot.in/2012/04/2009-toyota-tundra-driver-side-door.html
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Central locking not working ? http://schematicsdiagram.blogspot.in/2012/03/this-is-how-system-operates.html

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Remote will not unlock Rear door ?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html


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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html

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How to Access car door panel?
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-----

Vehicle door panel components?
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This will help.
Thanks.

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