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Home >> Chevrolet >> 2018 >> City Express LS >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Data Communication System >> Diagnostic Information And Procedures >> DTC U1117: Lost Communication With Electronic Brake Control Module >> Circuit/System Description

Circuit/System Description

Controller Area Network (CAN) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN High line, CAN Low line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.