CAB ? Not sure what you are talking about; Controller Anti-lock Brake? has nothing to do with the car locking/unlocking>
First place to start is disconnect the anti theft siren under the front windshield cowl. When you looked at the air pump in the truck did you clean all the electrical connections? It could be a simple broken leaking air hose.Disconnect the air lines at the pump and place your fingers over the holes if you can reach it and see if the pump develops air pressure and a vacuum when you use your FOB.
PS. clear those codes and see if they return after a short test drive.