Diagnosis And Testing - Remote Keyless Entry Module
WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The most reliable, efficient, and accurate means to diagnose the power lock system requires the use of a scan tool and the proper Diagnostic article.
Refer to the appropriate wiring information, refer to SYSTEM WIRING DIAGRAMS and CONNECTOR/GROUND/SPLICE LOCATION .