Hello all. Within the past few months I have been experiencing an issue where when I park my passenger door locks do not unlock. Pressing the buttons on the remote and the doors will not unlock them either. The more i press lock or unlock the weaker the locks sound as they try to move until they stop making any attempt to unlock at all and i just hear clicking (this includes the driver lock as well at this point). I checked fuses, relays, and looked at the bcm for physical signs of a damaged component. Any ideas?
Important: If all 3 passenger door locks are inoperative from both door lock switches, test the unlock control circuit between the splice and the BCM for an open.? Do you know how to do this ? Looking at a wiring diagram an using a DMM - digital multi-meter ?
Free wiring diagrams here http://www.bbbind.com/free-tsb , enter vehicle info. year , make , model an engine size . under system click on body & accessories , then under subsystem click on power locks . Click search button then the blue link . Or maybe your best bet mite be to take it to a qualified repair shop. You would need factory service repair info. to find splice location .
Power Door Locks Inoperative - Passenger Door
Step
Action
Yes
No
Schematic Reference: Door Lock/Indicator Schematics
Connector End View Reference: Vehicle Access Connector End Views
DEFINITION: One or all 3 of the passenger door lock actuators do not operate, or, the front passenger door lock switch does not operate.
1
Did you perform the Diagnostic System Check - Vehicle?
Go to Step 2
Go to Diagnostic System Check - Vehicle
2
Verify that the Power Door Locks Inoperative - Passenger Door fault is present.
Do the door locks operate as described in Power Door Locks Description and Operation ?
Go to Testing for Intermittent Conditions and Poor Connections
Go to Step 3
3
Are all 3 of the passenger doors locks inoperative from both door lock switches?
Go to Step 10
Go to Step 4
4
Install a scan tool.
Close all of the vehicle doors.
With the scan tool, observe the Right Front (RF) Door Lock Switch parameter in the Data Display, Inputs list of the body control module (BCM).
Operate the front passenger door lock switch to both the LOCK and UNLOCK positions.
Did the parameter change to both the LOCK and UNLOCK states?
Go to Step 7
Go to Step 5
5
Important: If the 3-amp fuse of the jumper wire opens when the jumper wire is connected, test the appropriate signal circuit for a short to battery positive voltage.
Disconnect the harness connector of the front passenger door lock switch.
Connect a 3-amp fused jumper wire between the lock switch lock signal circuit of the harness connector and a ground.
Observe the RF Door Lock Switch parameter.
Connect the 3-amp fused jumper wire between the lock switch unlock signal circuit of the harness connector and a ground.
Observe the RF Door Lock Switch parameter.
Did the Scan Tool parameter change to the both the LOCK and UNLOCK states?
Go to Step 6
Go to Step 8
6
Connect the 3-amp fused jumper wire between the lock switch lock signal circuit and the ground circuit of the harness connector while observing the appropriate Scan Tool parameter.
Did the Scan Tool parameter change to the LOCK state?
Go to Step 11
Go to Step 14
7
Disconnect the harness connector of the inoperative door lock actuator.
Connect a test lamp between the door lock actuator lock control circuit and the door lock actuator unlock control circuit of the harness connector.
Operate the front passenger door lock switch to the LOCK and UNLOCK positions.
Did the test lamp illuminate in both positions?
Go to Step 13
Go to Step 9
8
Test the signal circuits of the front passenger door lock switch for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 12
9
Test the lock control circuit of the inoperative door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 10
10
Important: If all 3 passenger door locks are inoperative from both door lock switches, test the unlock control circuit between the splice and the BCM for an open.
Test the unlock control circuit of the inoperative door lock actuator for an open. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 12
11
Inspect for poor connections at the harness connector of the front passenger door lock switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 15
12
Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 16
13
Inspect for poor connections at the harness connector of the inoperative door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 18
Go to Step 17
14
Repair the open ground circuit of the front passenger door lock switch. Refer to Circuit Testing and Wiring Repairs .
Did you complete the repair?
Go to Step 18
--
15
Replace the front passenger door lock switch. Refer to Front Side Door Lock Replacement .
Did you complete the replacement?
Go to Step 18
--
16
Replace the BCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?
Go to Step 18
--
17
Replace the inoperative door lock actuator. Refer to Front Side Door Lock Actuator Replacement
Did you complete the replacement?
Go to Step 18
--
18
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 2
Do you think there is any chance there could be a bad capacitor or something like that somewhere? It's almost like there isn't enough power to move the locks and the more I press the button in a short amount of time the weaker the locks sound and seems like less power to them as well.
Capacitor no , corrosion ( resitance ) in the circuit maybe , capacitor no.
Testing the electrical circuit using voltage drop testing , testing Battery voltage an ground circuits using a DMM - digital multi - meter is the way to find the problem , not guessing .
https://www.youtube.com/watch?v=YaYtCVBo...
Thank you. I appreciate the information. I will test it out and see what is going on. Another note someone I work with stated to me that it could be a bad actuator causing the issue that I am seeing. Do you think that this could be a possibility or should I disregard that info and go with what you suggested?
No , not a actuator , that would just affect one door . I think electrical issue , wiring , connection problem , high resistance . But , without testing this would be just a guess . You need to get in there an test using a voltmeter , not guessing an replacing part's .
Alright. Thank you again, Jeff. Ill get at it this weekend and take a look.
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SOURCE: 2004 tahoe
make sure than you have not split any fluids on the passenger front door most of the times is where the module to control the windows and doors is located, try by unpluging the batterie and the after a minute plug it back and see what happend but if any of your ft doors have been split with liquid or rain has gone inside then most likelly the module got moisture and not working
SOURCE: Audi A3 2004 remote opens door then it locks straight away
drivers door lock needs replacing,if you have the central electronics checked it will give you a code,and i will possibley be that door,the microswitches play up in them quite a common fault
SOURCE: Door locks not working 2000 GMC truck.
you will need to remove the door panel to get to the actuator, there is probably a clip that has either broken or popped out
SOURCE: My power door locks lock but not unlock the doors
first thing to check is the wireharness under the passengers floor mat,you wiil probably find a mass of corrosion and bad connections,been there done that!
SOURCE: power door locks not working. when you press the
it is a safety feature, you need to hit the lock button again,
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