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U1001 CAN COMM CIRCUIT EC-625 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O U1001 CAN COMM CIRCUIT Description INFOID:0000000007358476 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. On Board Diagnosis Logic INFOID:0000000007358477 MIL will not illuminate for this self-diagnosis. DTC Confirmation Procedure INFOID:0000000007358478 1. Turn ignition switch ON and wait at least 3 seconds. Diagnosis Procedure INFOID:0000000007358479 Go to LAN-53, "CAN Communication Signal Chart" . DTC No. Trouble diagnosis name DTC detecting condition Possible cause U1001 CAN communication line When ECM is not transmitting or receiving CAN • Harness or connectors (CAN communication line is open or August 2012 2012 Pathfinder |