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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (DTCS P1D94 To U1479 - 8HP70 Automatic Transmission - 1500) >> Diagnosis And Testing >> P1DDE-Ignition Run/Start Input 1/2 Correlation >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

The purpose of the diagnostic is to monitor if the hard-wired ignition signal state is equal to the ignition signal state received on the CAN BUS. The CAN message is sent by the Central Body Controller (CBC) to the Transmission Control Module (TCM).

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