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U1001 CAN COMM CIRCUIT EC-577 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O U1001 CAN COMM CIRCUIT Description INFOID:0000000010986294 CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- DTC Description INFOID:0000000010986295 DTC DETECTION LOGIC POSSIBLE CAUSE Harness or connectors (CAN communication line is open or shorted) 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 1st trip DTC. Is 1st trip DTC detected? YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000010986296 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 U1001 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN communication signal oth- |