Conditions for Running the DTC
WARNING: This page is about a different car, the 2008 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The following are conditions that must be present in order for the radio to enable the diagnostics.
- The radio is in ACCESSORY, RUN, or RAP power mode.
- The system voltage is at least 9 volts and no more than 16 volts.