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EC-172 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] U0101 CAN COMM CIRCUIT U0101 CAN COMM CIRCUIT Description INFOID:0000000011277918 CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- tiplex communication line with high data communication speed and excellent error detection ability. Many elec- tronic 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 Description INFOID:0000000011277919 DTC DETECTION LOGIC POSSIBLE CAUSE CAN communication line between TCM and ECM FAIL-SAFE Not applicable DTC CONFIRMATION PROCEDURE 1. PERFORM DTC CONFIRMATION PROCEDURE 1. Turn ignition switch ON and wait at least 3 seconds. 2. Check DTC. YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000011277920 Perform the trouble diagnosis for CAN communication system. Refer to LAN-17, "Trouble Diagnosis Flow . DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition U0101 LOST COMM (TCM) When ECM is not transmitting or receiving CAN communication signal of |