Vauxhall Workshop Service and Repair Manuals > Astra J > Safety and Security | Theft Deterrent | Diagnostic Information and Procedures | Miscellaneous

Symptoms - Theft Deterrent

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

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

•

There are no DTCs set.

•

The control modules can communicate via the serial data link.

2.	Review the system operation in order to familiarize yourself with the system functions. Refer to the following Content Theft Deterrent (CTD) Description and Operation .

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

•	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 .

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

•	Content Theft Deterrent Malfunction

•	Glass Breakage Sensor Malfunction

•	Security Indicator Malfunction

•	Theft Deterrent Alarm Malfunction