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Home >> Chrysler >> 2011 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 234 (DTCS P1D94 To U1479 - 8HP45 Automatic Transmission - 1500) >> Diagnosis And Testing >> U0404-Implausible Data Received From ESM >> 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 messages sent on a dedicated CAN BUS and are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Transmission Control Module (TCM) verifies that it has received the proper number of bytes for each ID.

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