Conditions for Running the DTC

WARNING: This page is about a different car, the 2015 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.

Ignition in RUN or ACC position.
The system voltage is at least 9.5 V and no more than 15.5 V.
The multimedia player interface module detects a device has been connected to the auxiliary audio input jack.