SECURITY Telltale

The SECURITY telltale on the instrument cluster is controlled by both the VTD system and the CTD system. The SECURITY telltale is a part of the reconfigurable message center on the instrument cluster. The SECURITY telltale is controlled by the body control module through the class 2 data line.

The VTD system, contained in the BCM, commands the instrument cluster to control the telltale only when the ignition switch is ON. The VTD system uses the telltale as a malfunction indicator. If a DTC is present in the VTD system when the ignition is ON, the telltale will be illuminated.

The CTD system, also contained in the BCM, commands the instrument cluster to control the telltale only when the ignition switch is OFF. The CTD system uses the telltale to identify system status.
- Telltale FLASHING - The system is in standby mode. The system is not ready to arm (a door is open).
- Telltale ON STEADY - The system is in delay mode. The system is ready to arm and is executing a time delay of 15 seconds before turning the lamp OFF and transitioning to armed mode.
- Telltale OFF - The system may or may not be armed.