Driver side door lock will not lock electronically

2010 town and country side door fixes.wmv - YouTube

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www.youtube.com/watch?v=3QR6vTD2W2E
Dec 31, 2011 - Uploaded by 1cont Here is a common problem. door lock stops responding to electronic buttons. Diagnosis is a faulty lock ..

The Power Door Lock System is controlled by the body control module (BCM) and can be activated by any one of the following
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A door lock switch lock or unlock actuation.

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A door lock cylinder switch unlock actuation.

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A keyless entry transmitter actuation.

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An automatic door lock actuation (Personalization function).

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An automatic door unlock actuation (Personalization function).

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A last door closed locking (LDCL) actuation (Personalization function).

Door Lock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the lock position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the lock position.
Driver Door Unlock Operation
When the body control module (BCM) detects a transition of either of the door lock switches to the unlock position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the left front (LF) door lock actuator motor transitions to the Unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function (if programmed).
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections.
A factory scan tool would help for checking inputs from the door switches to the BCM ! You could do it with out scan tool , a lot more work involved ! Need a wiring diagram an a component location chart an wiring harness routing diagram !
Most intermittent conditions are caused by faulty electrical connections or wiring. Inspect for the following items:
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Wiring broken inside the insulation

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Poor connection between the male and female terminal at a connector

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Poor terminal to wire connection--Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire insulation rather than the wire itself, and corrosion in the wire to terminal contact area, etc.

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Pierced or damaged insulation can allow moisture to enter the wiring causing corrosion. The conductor can corrode inside the insulation, with little visible evidence. Look for swollen and stiff sections of wire in the suspect circuits.

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Wiring which has been pinched, cut, or its insulation rubbed through may cause an intermittent open or short as the bare area touches other wiring or parts of the vehicle.

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Wiring that comes in contact with hot or exhaust components

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Refer to Inducing Intermittent Fault Conditions in order to duplicate the conditions required, in order to verify the customer concern.

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Refer to Testing for Electrical Intermittents for test procedures to detect intermittent open, high resistance, short to ground, and short to voltage conditions.

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Refer to Scan Tool Snapshot Procedure for advanced intermittent diagnosis and Vehicle Data Recorder operation.

You should take it to a ASE certified repair shop if not familiar with Automotive electronics !

The locks on your vehicle are electronically controlled by the BCM - body control module . The driver an passenger door switche's are input's to the BCM . Do you know anything about automotive electronic's ? anti theft alarm remote, could this be part of the problem , No it's just a key less entry remote , nothing to do with the anti-theft .
Door Lock System Components
The Power Door Lock System consists of the following components:
• Body control module (BCM)
• Driver door lock switch
• Front passenger door lock switch
• Door lock actuators in each of the doors
• IBCM (PWR) 15-amp fuse

Door Lock System Controls
The Power Door Lock System is controlled by the body control module (BCM) and can be activated by any one of the following:
• A door lock switch Lock or Unlock actuation
• A keyless entry transmitter actuation
• An automatic door lock actuation
• An automatic door unlock actuation
• A last door closed locking (LDCL) actuation

Driver and Passenger Door Unlock Operation w/o Keyless Entry
When the body control module (BCM) detects a transition of either of the door lock switches to the Unlock position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the driver passenger door lock actuators transition to the Unlock position.

Your best bet , take your vehicle to a qualified repair shop ! Need special tool to diagnose .

Power Door Locks Inoperative

Install a scan tool.
Turn ON the ignition, with the engine OFF.
With a scan tool, observe the door lock switch parameter in the Doors data list.
Does the scan tool display Idle?
YES - Go to Step 4
NO - Go to Step 8
4
Activate the driver door lock switch to the LOCK and UNLOCK positions.
Does the scan tool display Idle?
YES - Go to Step 9
NO - Go to Step 5
5
Activate the front passenger door lock switch to the LOCK and UNLOCK positions.
Does the scan tool display Idle?
YES - Go to Step 9
NO - Go to Step 6
6
With a scan tool, observe the driver door lock actuator command and the passenger door lock actuator command parameters in the Doors data list.
Activate a door lock switch to the LOCK and UNLOCK positions.

Hey Anon, if everything else is working, no blown fuses,, the motor that runs the lock action has quit..there MIGHT be a connection issue, one of my vehicles auto locks quit.. I removed the electrical connections and replugged them and everything started working again.. try that..nothing to loose..its not a uncommon issue..

i suspect the drivers door lock ,its has built in electronics and this could be faulty ,check the fuses first though .

hi the module is behind rt side of dash but these cars have a history of the master switch [driver door] going bad causeing slow or no opperation hope this helps don

The relay is working fine if the automatic locking system is working. The module for the automatic door locks has a circuit to lock the doors upon shifting the vehicle to drive. The circuitry has a relay built into it that unlocks the doors when parked so that module is not fuctioning properly for the unlocking mode

lock actuator is bad...

Pull the door panel & replace the electronic lock solenoid.
Not easy, but this is what you need to do.