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Home >> Fiat >> 2014 >> 500L Easy, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (DTCS P1CC0-00 To U1508-00 - C635 DDCT Automatic Transmission - 500L) >> Diagnosis And Testing >> U0121-00-Lost Communication With Antilock Brake System (Abs) Control Module >> Theory Of Operation

Theory Of Operation

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This diagnostic checks the status of the CAN communication between the ABS CAN node and the TCM. The TCM checks for continuous reception of the messages from the ABS CAN node and it also checks for correct length of the messages from the ABS CAN node. If one of these two tests fails, the TCM sets the ABS CAN node failure.