Component Tests and General Diagnostics

When trouble shooting problems with the Remote Keyless Entry System, always verify that the power door lock/unlock switches are functional. If the doors do not lock/unlock with the power switches, the following modules should be analyzed:
- Lock/Unlock Switches
- Body Control Module
- Lock and unlock relays
- Door lock/unlock motors

If the following modules do not work:
- Remote keyless entry system
- Radio/clock
- Body Control Module
- Door lock switches

A blown fuse is the probable cause. The remote keyless entry fuse 13 is located in the Junction Block. To check for a blown fuse, pull the fuse out slightly, but maintain contact between the fuse terminals and the terminals in Junction Block. Using the voltmeter probe, check both terminals for 12 volts. If only one terminal measures battery voltage, the fuse is defective and must be replaced. If neither terminal measures battery voltage, check for an open or shorted circuit to the Junction Block, repair as needed. If battery voltage is still not available, check the high current fuse G in the Power Distribution Center, located in the engine compartment.

To diagnose the Remote Keyless Entry (RKE) System, use a DRB III scan tool and refer to Power Door Lock System in the proper Body Diagnostic Procedures.

When testing the system, all doors must be closed to prevent courtesy lamps from lighting. Verify that remote keyless entry system is operating properly before testing illuminated entry circuits. The body controller uses input from the remote keyless entry system to switch ON the courtesy lamps.

Refer to Body Systems Diagnostic Procedures for complete diagnostic information.