LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2014 >> Compass Limited, AWD, Automatic Trans >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 5 ((Transmission Control Module (TCM) - Electrical Diagnostics - CVT Automatic Transmission)) >> DTC Troubleshooting >> U0121-Lost Communication With Antilock Brake Module >> Theory Of Operation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The Controller Area Network (CAN) is a high speed serial communication line for multiplex communication between multiple controllers that reside on the network. The Transmission Control Module monitors the transmit and receive message from the CAN BUS.