BRC

U1000 CAN COMM CIRCUIT





Description
CAN (Controller Area Network) 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 H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.




DTC Logic

DTC DETECTION LOGIC









Diagnosis Procedure
1.CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check the terminals for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or replace the terminal.
2. Reconnect connector and perform self-diagnosis. Scan Tool Testing and Procedures.
Is "CAN COMM CIRCUIT" displayed in self-diagnosis display items?
YES - Print out the self-diagnostic results, and Trouble Diagnosis Flow Chart.
NO - Connector terminal is loose, damaged, open, or shorted.