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LAN-10 < SYSTEM DESCRIPTION > [CAN FUNDAMENTAL] TROUBLE DIAGNOSIS TROUBLE DIAGNOSIS Component Description INFOID:0000000010120350 Condition of Error Detection INFOID:0000000010120351 DTC (e.g. U1000 and U1001) of CAN communication is indicated on SELF-DIAG RESULTS on CONSULT if a CAN communication signal is not transmitted or received between units for 2 seconds or more. CAN COMMUNICATION SYSTEM ERROR • CAN communication line open (CAN-H, CAN-L, or both) • CAN communication line short (ground, between CAN communication lines, other harnesses) • Error of CAN communication control circuit of the unit connected to CAN communication line WHEN DTC OF CAN COMMUNICATION IS INDICATED EVEN THOUGH CAN COMMUNICATION • Removal/installation of parts: Error may be detected when removing and installing CAN communication unit and related parts while turning the ignition switch ON. (A DTC except for CAN communication may be detected.) • Fuse blown out (removed): CAN communication of the unit may cease. • Voltage drop: Error may be detected if voltage drops due to discharged 12V battery when turning the ignition switch ON (Depending on the control unit which carries out CAN communication). • Error may be detected if the power supply circuit of the control unit, which carries out CAN communication, malfunctions (Depending on the control unit which carries out CAN communication). • Error may be detected if reprogramming is not completed normally. NOTE: CAN communication system is normal if DTC of CAN communication is indicated on SELF-DIAG RESULTS of CONSULT under the above conditions. Erase the memory of the self-diagnosis of each control unit. JSMIA0527GB Component Description Main line CAN communication line between splices Branch line CAN communication line between splice and a control unit Splice A point connecting a branch line with a main line Termination circuit Circuit connected across the CAN communication system. (Resistor) |