MY KEYLESS FOB WILL LOCK DOORS, BUT NOT UNLOCK THEM

test or change batteries in fob

NO FOBS DETECTED
Refer to Keyless Entry System Description and Operation

Keyless Entry System Description and Operation - Passive
Passive keyless entry allows entry to a locked vehicle without pressing any buttons on the keyless entry transmitter. You must only have the transmitter with you. This passive system is also part of the vehicle starting system. It allows you to start and run the vehicle having only the transmitter as your key. The passive entry and starting system use low frequency antennas in 4 different areas on the vehicle to determine the location of the transmitter. When passively opening a locked door or the rear compartment lid, you must have a programmed transmitter with you in your pocket, purse, or briefcase. As a customer opens the door handle or presses rear compartment touch pad, the low frequency antenna sends out a challenge to the keyless entry transmitter. The transmitter must be in a one meter range of the door or rear compartment lid in order to receive the challenge. If the challenge is met, the transmitter will respond, allowing the door to be unlocked and opened. Passive entry allows you to operate the following features:
• Passive door unlock/unlatch
• Passive rear compartment lid release
• Illuminated entry lamps
• Vehicle starting
The keyless entry system has the following components:
• Keyless entry transmitters
• LH and RH door antennas (part of the door handle assembly)
• Rear compartment antenna
• Console passive antenna
• Console active antenna
• Instrument Panel Module (IPM)
• Rear Integration Module (RIM)
• Remote Control Door Lock Receiver (RCDLR)
• External RF Antenna (includes coax from RCDLR to back glass)

Remote Control Door Lock Receiver (RCDLR)
The RCDLR is a multi-function module which controls all the vehicles antennas for passive keyless entry functions. The RCDLR also acts as the receiver for active keyless entry and tire pressure monitoring (TPM) functions, as well as controlling all immobilizer functions.
The RCDLR's RF antenna is located in the back glass, and there is a coax cable connecting the glass antenna to the module located in the trunk.

Your best bet , take it to a qualified repair shop that has the factory Tech 2 scan tool or someother professional type scanner that can read • Rear Integration Module (RIM) DTC'S - diagnostic trouble codes .

1996 Roadmaster

1. Locate the programming connector located in the LH trunk. Trim may have to be pulled back to access programming connector. ( Connector has black/white wires leading up to it and it is not connected to anything.)
2. Jump programming connector terminals. Leave terminals jumped unitl step 6.
3. System should now lock and unlock doors to indicate programming mode has been entered.
4. Press any button on keyless remote once. System should now lock and unlock doors, indicating successful programming of keyless remote.
5. Repeat step 4 for additional remote or other existing keyless remote. NOTE: A maximum of only two Keyless Remotes can be programmed.
   
6. Remove programming connector jumper wire to exit programming mode.
7. Test remote(s).

Close all the vehicle doors. Insert the ignition key into the ignition lock cylinder. Press and hold the DOOR unlock switch. While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF. Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode. Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds , the doors will lock and unlock to confirm the programming of that transmitter. Repeat the previous step to program up to four transmitters. - See more at: http://theandrewhughes.com/2007/05/how-to-program-most-gm-key-fobs/#sthash.6oXk0NFT.dpuf

does your unlock button work in car? If it does, do you have another keyless entry key fob? If so does it work? If you just replaced the battery you can try removing battery and cleaning contacts within remote. I know some of the nissan altimas had the same issue and the only solution was a new key fob. Good Luck

most newer vehicles will not lock the door with the keys in the ignition and/or the keyless start remote fob in the vehicle. Vitara has a small button on the handle that will unlock the door if you have the fob in your pocket if the fob is in the car it can"t be secured since it is set up to unlock when the fob is within a couple feet of the vehicle. I know this is a late post for your question maybe it will help others

Transmitter Programming Procedure
Close all the vehicle doors.
Insert the ignition key into the ignition lock cylinder.
Press and hold the door unlock switch.
While holding the door lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
Release the door unlock switch. The doors will lock and unlock to confirm the program mode.
Press and hold the LOCK button and the UNLOCK button simultaneously on the transmitter. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of the transmitter.
Turn the ignition switch to the RUN position in order to exit the keyless entry transmitter mode.
Operate the transmitter functions in order to verify correct system operation.
Good luck

Instructions to program a keyless entry remote for a Chevy Silverado. They also work on 2003, 2004 and 2006 Suburbans.

1. Close all the vehicle doors.
2. Insert the ignition key into the ignition lock cylinder.
3. Press and hold the DOOR unlock switch.
4. While holding the DOOR lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
5. Release the DOOR unlock switch. The doors will lock and unlock to confirm the program mode.
6. Press and hold the LOCK button and the UNLOCK button simultaneously on one keyless remote. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
7. Repeat the previous step to program up to four transmitters.
8. Turn the ignition switch to the RUN (one more click forward) position in order to exit the keyless entry transmitter mode.
9. Operate the transmitter functions in order to verify correct system operation

To get inside the car .... Use the key in the lock cylinder, unlock the drivers door to get inside. You shouldn't have to reprogram the fob unless it or the keyless module was changed. There may be a blown fuse that supplies the keyless control module (check the owners manual for location). or wires that lead into the Drivers door may be damaged ... The keyless module is located inside the drivers door at the bottom behind the door panel ... do the unlock/lock and trunk release switches on the inside of the drivers door operate the locks and or trunk release? If so it is not the fuse ... and not the wires to it ... And it could be your BCM body control module, located in the dash board to right of your gas petal. Because the number entry keypad (code for that is on the inside of the right passenger trunk bracket arm) also doesn't work I assume it's not the key fobs themselves. Your 98 manual is correct for your car.

there are 3 possibilities that I would check first. 1: make sure the contacts on the door, and body where the touch are clean. the lock and unlock signal are sent through these. 2: You may try replacing the battery in your key fob. 3: the power lock motors may have gone bad. To check, lock the doors with the drivers door panel, if they lock, they are fine. Another solution may be to recode your key fob. procedure for coding the fob to your vehicle can be found online.