Pontiac Grand Prix:

remote won't lock doors easily anymore

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# 1  10/6/2014 1:36 AM

dwbdwb1
Senior Member
Registered: 7/6/2014
Posts: 33

remote won't lock doors easily anymore

About a week or so now the remote control won't lock the doors after several tries. Still unlocks the doors well but not to lock them.

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# 2  10/6/2014 3:44 AM

TechHelp2
Administrator
Registered: 11/24/2009
Posts: 1299

Re: remote won't lock doors easily anymore

I need to know the year of the car so I can check on service bulletins, trouble shooting procedures and wire schematics.


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# 3  10/6/2014 3:50 AM

dwbdwb1
Senior Member
Registered: 7/6/2014
Posts: 33

Re: remote won't lock doors easily anymore

1999 Pontiac Grand Prix SE 3.1L

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# 4  10/6/2014 10:38 AM

TechHelp2
Administrator
Registered: 11/24/2009
Posts: 1299

Re: remote won't lock doors easily anymore

Try this procedure for the transmitter to be relearned. Let me know if this works.

Loss of transmitter synchronization will occur when the following conditions are present:

If the transmitter is activated more than 256 times while the transmitter is out of range of the remote control door lock receiver.
After the transmitter battery replacement, if the transmitter is immediately activated more than 16 times while the transmitter is out of range of the remote control door lock receiver.

In order to resynchronize the transmitter, press and hold the transmitter LOCK and UNLOCK buttons simultaneously for at least 7 seconds, or until the following condition is present, the horn sounds 3 times.

Perform the transmitter resynchronization procedure if the following conditions exist:

The batteries on the keyless entry transmitter have been replaced.
A keyless entry transmitter is malfunctioning.

Information provided by the Alldata automotive information website.


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# 5  10/8/2014 5:39 AM

dwbdwb1
Senior Member
Registered: 7/6/2014
Posts: 33

Re: remote won't lock doors easily anymore

I did the recommended 7 second simultaneous button hold down and it beeped once. I did this from several positions from around the car at a maximum distance. It is improved but it can still take up to four tries for it to lock. The unlock is good for the most part now. Should I expect better? Also, will this fix work with any car?

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# 6  10/8/2014 8:48 PM

TechHelp2
Administrator
Registered: 11/24/2009
Posts: 1299

Re: remote won't lock doors easily anymore

You may have to go to the dealer and have them check out the operation of the keyless entry system. The mechanic can use special tools like a scanner to check for the proper operation of the system and also use a device that can check out the operation of the remotes. Sometimes there is an update to the programming of the keyless door lock system and reprogramming of the computer would be needed.

You can try this reprogramming procedure I got from Alldata automotive information website to see if it makes a difference. Usually there are different procedures for different cars so they are all not the same.

IMPORTANT:

Once entering this procedure, programming the first transmitter erases all previous transmitters. You must program all transmitters.

1.Pull the MALL PGM Fuse.

2.Turn the ignition switch to the ACC position. The seat belt indicator flashes and the chime sounds 2, 3 or 4 time . This action identifies which type of BCM, is installed on the vehicle. Check that the BCM installed on the vehicle is compatible with all of the features on the vehicle. Keyless entry requires BCM type 3 or 4. Refer to Body Control Module Diagnostic Information in Body Control System for more information.

3.Turn the ignition switch from the ACC position to the OFF position, then back to the ACC position within 1 second. This action causes the BCM to enter the diagnostic/program mode. The BCM may flash and chime Diagnostic Trouble Codes (DTCs) . The number of flashes and chimes equals the DTC number. If there are DTCs in memory, record the DTCs. Then refer to Body Control Module Diagnostic Information in Body Control System for more information.

4.Open and close any vehicle door. You should hear a chime if you are in the diagnostic/program mode. If unable to enter diagnostics, refer to Body Control Module Diagnostic Information in Body Control System for more information.

5.Press and hold the lock and unlock buttons at the same time on the keyless entry transmitter for 14 seconds.
At the 7-second mark, you may hear a chime. This chime feedback indicates that the transmitter has been resynchronized.
Continue holding the lock arid unlock buttons until hearing another chime ground the 14-second mark. This chime feedback indicates that the transmitter has been programmed successfully.
6.Repeat step 5 for the rest of the transmitters (for a total of 4 transmitter).

7.Exit the BCM diagnostics/programming mode:
Turning the ignition switch to the LOCK position.
Reinstall the MALL PGM Fuse.

If this doesn't work then you would need to go to the dealer for proper diagnosis. Any GM dealer should be fine.


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