Traction Control System Indicator - TRAC OFF

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The instrument panel cluster illuminates the TRAC OFF indicator when the following occurs:

The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The instrument panel cluster receives a serial data message from the EBCM requesting illumination.
The body control module (BCM) detects that the traction control switch has bee pressed (signal circuit is low). The BCM sends a serial data message to the EBCM in order to disable traction control. The instrument panel cluster receives a serial data message from the EBCM requesting illumination. The BCM sends a serial data message tot he radio in order to activate an audible warning.
The battery voltage is low.