Preliminary Inspection

Verify transmitter is applicable to Cadillac Catera models. See TRANSMITTER IDENTIFICATION  . Check DOOR LOCK fuse No. 28 (20-amp) at instrument panel fuse block. Ensure all electrical connectors, circuits and grounds are okay. Try second transmitter. If second transmitter operates system, replace battery in first transmitter. Ensure transmitter battery terminals are clean and making good contact. Ensure power door locks system is operational. See appropriate POWER DOOR LOCKS - CATERA article. If any problems are found, repair as necessary. If no problems are found, go to REMOTE KEYLESS ENTRY DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.