Symptoms - Theft Deterrent. Chevrolet Impala 2005

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2005 🢒 Impala 🢒 Accessories 🢒 Theft Deterrent 🢒 Symptoms - Theft Deterrent

Important: The following steps must be completed before using the symptom tables.

Perform Diagnostic System Check - Vehicle in order to verify that all of the following are true:

•	There are no DTCs set.

•	The control module(s) can communicate via the serial data link.

Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

•	Theft Systems Description and Operation

•	Content Theft Deterrent (CTD) Description and Operation

•	Vehicle Theft Deterrent (VTD) Description and Operation

•	Inspect for aftermarket devices which could affect the operation of the Theft Deterrent System. Refer to Checking Aftermarket Accessories in Wiring Systems.

•	Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

•	The vehicle will not start; No DTCs are set; The SECURITY indicator is ON. Refer to DTC B2958

•	Content Theft Deterrent (CTD) Alarm Mode Inoperative

•	Content Theft Deterrent (CTD) Does Not Disarm with Key Lock

•	Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode

•	Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode