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Home >> Jeep >> 2009 >> Compass Limited, ED3, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 ((All Wheel Drive (AWD) Module - Electrical Diagnostics)) >> DTC Troubleshooting >> U0423-Implausible Data Received From Cluster/CCN >> Theory Of Operation

Theory Of Operation

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The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The All Wheel Drive (AWD) Control Module verifies that it has received the proper number of bytes for each ID.

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