Quote:
Originally Posted by Conajw
Where is the module that controls the automatic opening and closing by the key
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The
FZV (central locking) feature of the remote key is controlled by the
GM III (general module)...as well as the
DWA (Anti-theft alarm siren system). The
EWS (immobilizing feature) operates on a different 125 KHz RF (radio frequency) and communicates with different modules and is also self powered through induction so it doesn’t require the battery inside the remote key to operate like FZV & DWA.
Make sure that your new remote was designed to communicate over the 315 MHz radio frequency. If you have the European key...it operates on the 433 MHz RF and won’t communicate with your GM III.
The remote sends a 315 MHz (in North America) RF signal to an antenna embedded in the rear windshield...which then goes to amps in the C pillars...which then sends the signal to the GM where commands are sent to central locking and the anti-theft alarm system to lock/unlock and arm/disarm. See the instructions below on how to correctly program your old remote or new remotes to lock/unlock & arm/disarm the vehicle.
There are also specific things that must be done to initialize a remote...if those things aren’t followed exactly...the programming will fail. Some things to make sure to do are:
- Make sure ALL doors are closed
- Make sure All doors are unlocked
- Turn key to KL R position (1st ignition position)
- All remotes must be programmed in the same session...any remote not programmed in the last session will not have the current rolling code table info assigned by the GM
{You can see the GM III controls the FZV & DWA systems in the communication bus topological chart below}