Security Indicator Operation

The instrument cluster illuminates the SECURITY indicator in the message center as determined by the VTD and CTD systems. The instrument cluster receives a class 2 message from the BCM in order to control the indicator.
^ The VTD system commands the instrument cluster to control the indicator only when the ignition switch is ON. The VTD System uses the indicator as a malfunction indicator.
^ The CTD system commands the instrument cluster to control the indicator only when the ignition switch is OFF. The CTD System uses the indicator to identify system status.