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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 ((Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE)) >> DTC Troubleshooting >> P1684-Battery Was Disconnected >> Theory Of Operation

Theory Of Operation

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Note: This is not a fault code. It exists to provide reference information only. A battery backed RAM is used to maintain some learned values. When the battery is disconnected, this memory is lost. When the battery is reconnected, the loss of learned values will be detected by the controller. The code will be set and the learned values will be initialized to known constants and the learning process will continue. Setting the code has no effect except for re-initialization of learned values.