Diagnostic Starting Point - Keyless Entry
WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Begin the system diagnosis with DIAGNOSTIC SYSTEM CHECK - REMOTE KEYLESS ENTRY . The Diagnostic System Check will provide the following information:
- The identification of the control module(s) which command the system
- The ability of the control module(s) to communicate through the serial data circuit
- The identification of any stored diagnostic trouble codes (DTCs) and their status
The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.