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BCS U1000 CAN COMM BCS-83 < DTC/CIRCUIT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM] C D E F G H I J K L B A O P N DTC/CIRCUIT DIAGNOSIS U1000 CAN COMM Description INFOID:0000000012200730 CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul- tiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, 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. CAN Communication Signal Chart. Refer to LAN-30, "CAN COMMUNICATION SYSTEM : CAN Communica- DTC Logic INFOID:0000000012200731 DTC DETECTION LOGIC Diagnosis Procedure INFOID:0000000012200732 1. PERFORM SELF DIAGNOSTIC 1. Turn ignition switch ON and wait for 2 seconds or more. 2. Check “Self Diagnostic Result” of BCM. YES >> Refer to LAN-17, "Trouble Diagnosis Flow Chart" NO >> Refer to GI-45, "Intermittent Incident" . DTC CONSULT display de- scription DTC Detection Condition Possible cause U1000 CAN COMM When BCM cannot communicate CAN com- CAN communication system |