P1684-Battery Was Disconnected
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
When Monitored: Whenever the ignition is in the Run/Start position.
Set Condition: This DTC is set whenever the Transmission Control Module is disconnected from battery power (Fused B+) and/or ground. It will also be set during a DRBIII® Battery Disconnect procedure and/or a Quick Learn procedure.