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U1001 CAN COMM CIRCUIT EC-551 < COMPONENT DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O U1001 CAN COMM CIRCUIT Description INFOID:0000000005273502 CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul- On Board Diagnosis Logic INFOID:0000000005273503 The MIL will not illuminate for this diagnosis. DTC Confirmation Procedure INFOID:0000000005273504 1. Turn ignition switch ON and wait at least 3 seconds. 2. Check 1st trip DTC. 3. If 1st trip DTC is detected, go to Diagnosis Procedure INFOID:0000000005273505 LAN-48, "CAN System Specification Chart" . DTC No. Trouble diagnosis name DTC detecting condition Possible cause U1001 CAN communication • When ECM is not transmitting or receiving CAN communication signal other than OBD • Harness or connectors (CAN communication line is open or |