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What is the BCM related to remote opener

Remote will lock doors but won't unlock

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  • 87 Answers

Take your fob to an auto parts store or dealer and have them test it, i bet it is bad and worn out, the new fob has to be programmed to your car

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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SOURCE: When I use my remote starter & door

The rear doors probably dont come w accuators in them. Meaning that the rear doors alot of times don't have power options. If you are certain that your rear doors have factory power locks then I would say it's a wire somewhere...did you try a double click of the unlock button. My two door chevy truck unlocks the driver door with one click and the pass door requires a double click. Hope this helps !

Posted on Mar 09, 2011

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  • 202 Answers

SOURCE: keyless remote won't lock or

Have you replaced the battery in the remote? Do you have another remote to try? If you haven't done so already that's where to start.

Posted on May 16, 2011

kayzack519
  • 226 Answers

SOURCE: won't open my door when

can you manually unlock the lock and open the door?? Is it more than one door or just one specific door? If its just one door, yourcactuator inside the door may be bad or you have a wire issue. If its all the doors, more than likely you blew a fuse or a relay(id say fuse)

Posted on May 23, 2011

Mr BrokRench
  • 1623 Answers

SOURCE: I have a 2003 Chevy

If you can hear the actuator clicking then the plastic ends that attach the rod lock/latch to it has most likely broke off. It's fairly common on the Tahoe and Blazer for this to happen. You can open the hatch and gate by removing the inside plate from latch handle and prying the latch open manually. I hope this helps.

Posted on Jul 02, 2011

jcorso3
  • 6 Answers

SOURCE: My 2005 Honda Odyssey driver's side manual

More than likely the connecting rod that goes from the door lock actuator to the locking mechanism itself came unattached. These rods are usually held in place by a small piece of plastic that the rods "pop" in and out. The only other thing i can imagine possible is that the door lock itself is actually seized up. In order to attempt to fix this, you would have to remove the door side panel to see the inner workings of the door, and this is quite difficult on most side sliding doors (i have a 2000 pontiac montana w/dual sliding doors). Hope this can help you solve your problem.

Posted on Oct 24, 2011

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What do I replace if my Auto door locks won't work


First off testing would need to be done to determen what the cause is . The door locks on your vehicle are controlled by a computer ,BCM - body control module . The first test would be to check for DTC'S diagnostic trouble codes in the BCM . An to do this you would need a factory scan tool , not a OBD2 code reader . 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
• Reversible door lock actuator in each of the doors
• IBCM (PWR) 15-amp fuse
• Driver door cylinder switch, if equipped
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 or unlock actuation
• A last door closed locking (LDCL) actuation
If the driver door cylinder switch feature of the vehicle is functional, the locks may also be operated by a driver door cylinder switch lock or unlock activation.
Your best bet would be to take to a ASE certified repair shop or the dealer.Because if the BCM were the problem an had to be replaced , it would need programming .
Each door lock switch is wired to the body control module (BCM) through a separate door lock/unlock signal circuit. While these circuits are separated between the BCM and respective door lock switch, they are connected into a single circuit within the BCM. The BCM supplies voltage through the door lock/unlock signal circuits to each door lock switch. When either door lock switch is operated, this supply voltage is pulled to ground, providing the BCM with the required lock or unlock signal. In order for the BCM to distinguish between a lock and unlock signal, the lock switch contains two separate paths for this voltage to flow to the same body ground. When the switch is operated to the unlock position, the supply voltage flows to ground through a 1.5K ohm resistor. When the switch is operated to the lock position, the supply voltage flows to ground through a different part of the switch circuit, which has no resistor. The BCM then interprets the flow of voltage as a lock or unlock request and powers the door lock actuators to the appropriate lock or unlock position.

Dec 20, 2015 | 2009 Chevrolet Malibu

1 Answer

My hatch won't release from the remote or the door switch. No solenoid sound at the hatch. How do I get it to open if it's not a bad fuse?


There are actually three relays , an there are controlled by the BCM - body control module !
When a door lock switch is activated in the lock or unlock position the BCM will receive a voltage signal on either the door lock switch lock or unlock signal circuits.
The BCM, upon receipt of a lock switch lock or unlock signal, will switch the appropriate lock relay control circuits to battery positive voltage. This will energize the appropriate lock or unlock relays. The relay will supply voltage to the door lock actuator lock or unlock control circuits to one side of the lock actuator. Since the opposing side of the lock actuators are connected to ground through the other lock actuator control circuit and the normally closed contacts of the lock or unlock relay, the doors and liftgate will then lock or unlock appropriately.
Three relays are used to operate the locks. DRV DR UNLCK relay, PASS DR UNLOCK and DR LCK relay. This is done to isolate the driver door lock actuator so it can be unlocked by itself using the keyless entry transmitter.
Rear Hatch/Gate Description and Operation
The liftgate can be opened by operating the switch on the instrument panel. Battery voltage is supplied to the liftgate actuator through the body control module (BCM). The BCM will pulse the liftgate actuator when a release input is received through the key fob, or the instrument panel switch.
Door/Lift gate Latch Assembly
  1. Install a 20-A fused jumper wire between the control terminal 3 and 12 volts. Install a jumper wire between the ground terminal 2 and ground.
  2. Verify the actuator turns on & off.
?‡'
If the function does not perform as specified, replace the applicable door latch.

Oct 01, 2015 | 2006 Pontiac Torrent

1 Answer

Door lock dont always work


What door lock doesn't always work ? One or all of them . This is a complex set up for these door locks ! The switch is an input to the BCM - body control module . There is logic involved in the microprocessor , there are relays built in to the BCM ! Could have a DTC - diagnostic trouble code stored in the BCM ! Could be a bad connection at the BCM or master window switch ! A bad ground !
The power door lock system consists of the following components:
?€¢
Body control module (BCM)


?€¢
DOOR LKS fuse


?€¢
Driver door lock actuator


?€¢
Driver door lock switch


?€¢
GMLAN serial data link


?€¢
Keyless entry transmitter


?€¢
Passenger door lock actuator


?€¢
Passenger door lock switch


?€¢
Remote control door lock receiver (RCDLR)


The DR LCK fuse supplies battery voltage to the body control module (BCM) for the power door lock system. The BCM supplies and monitors a reference voltage to the driver and passenger door lock switches through the door lock switch lock/unlock signal circuit. Each door lock switch receives ground at G300 which is also the ground for the door lock and unlock relays located in the BCM. When a door lock switch is placed in the lock position, the reference voltage is switched to ground and the BCM senses 0.0 volts on the door lock/unlock signal circuit. When a door lock switch is placed in the unlock position, the reference voltage is switched to ground through a 1.5k ohm resistor that is internal to each of the door lock switches and the BCM senses approximately 2.9 volts on the door lock/unlock signal circuit. The BCM interprets what position the activated door lock switch was placed in based on the voltage drop.
The BCM, upon receipt of a lock or unlock switch signal, will switch the appropriate door lock/unlock relay coil control circuit to ground causing the appropriate door lock/unlock relay to energize. With the relay energized, voltage is applied to the door lock actuator control circuit causing the door to either lock, or unlock depending on what command was received from the power door lock switch or remote control door lock receiver (RCDLR). When a power door lock/unlock relay is not energized, the switch contacts are normally grounded through the BCM which provides ground to the appropriate door lock actuator for the lock/unlock function being performed. The power door lock/unlock functions are performed by reversing the flow of voltage through the door lock actuator control circuits. The BCM has three internal drivers for the power door lock system. Driver door unlock, passenger door unlock and all door lock. This is done to isolate the driver door lock actuator so it can be unlocked separately from the passenger door. For additional information concerning keyless entry, refer to Keyless Entry System Description and Operation.
This is one you may want to take to dealer or some other ASE certified repair shop ! To do this right you need a Tech 2 scan tool !
Ignition ON, observe the scan tool Door Lock Switch parameter while using the driver and passenger door lock switches. The parameter should change from Idle to Lock and Unlock.
?‡'
If the value does not change, refer to Door Lock Switch Malfunction.

Command the doors to LOCK and UNLOCK with the scan tool, the door lock actuators should LOCK and UNLOCK when changing between the commanded states.
?‡'
If one or more doors do not LOCK or UNLOCK, refer to Door Lock Malfunction.

Aug 12, 2015 | 2009 Pontiac Solstice Convertible

1 Answer

2006 dodge caravan sxt passenger door sliding door won't unlock or open at all, manually or by remote


U will have to take the inside door cover off and manualy open it. And replace the electric door locking switch. Very common problem. Get the new lock and latch assembly from dealer,

Jun 13, 2012 | 2006 Dodge Caravan

1 Answer

Door ajar light on and locks keep locking and unlocking


need to gain access to the BCM to see which door the module is seeing open. the locks won't lock with key in ignition and a door is "open"

Jun 09, 2012 | 1997 Chrysler Town & Country

1 Answer

Wireless Key Remote door & trunk opener won't work with trunk anymore


When you press the trunk open button, do you hear any "release" noise come from the trunk area? The issue may be a bad battery in the key fob OR there could be an issue with the transmitter located inside the vehicle. Do the doors lock and unlock properly? is the vehicle equipped with security or immobilizer? please advise

Jun 03, 2012 | 2006 Toyota Camry LE

1 Answer

Remote start function on remote doesn't work for a 2005 Pontiac G6.


Replace battery first and see if that help, if not then follow steps below, if you cant figure it out or it still doesn't work, or take it to the dealer, it could be remote module is faulty. Keep the windows open as a safety measure, then,

Remove the ignition key from the ignition lock cylinder.

Remove the BCM PRGRM fuse from the fuse panel. Refer to Fuse Block in Wiring Systems.

Close all of the doors.

Close the liftgate.

Turn the ignition lock cylinder to ACC.

Turn the ignition lock cylinder to OFF, & then back to ACC within 1 second.

Open & close any vehicle door. A chime will be heard when the system enters the BCM programming/diagnostic mode.

Important
After 7 seconds, a chime may be heard confirming successful synchronization. It is necessary to wait approximately 14 seconds for a second chime that will confirm successful programming.


Press & hold the transmitter LOCK & UNLOCK buttons simultaneously for 14 seconds.

Repeat the previous step on each additional transmitter to be programmed.

Remove the ignition key from the ignition lock cylinder.

Install the BCM PRGRM fuse back into the fuse panel. Refer to Fuse Block in Wiring Systems.

Oct 07, 2009 | 2005 Pontiac G6

1 Answer

Automatic door locks will not work.


you need to take it to the dealer and have them check the bcm for codes.... also have them check to be sure you have the latest software in the bcm.. its possible that you just need a software update... there are several TSB's covering the concern you have..... it can be a very simple fix with software or even a stuck lock switch may need to be replaced... without the proper diagnostic codes being read from the bcm all that can be done is guessing..and that can be expensive...

Feb 02, 2009 | 2005 Chrysler Town & Country

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