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LAN-8 < SYSTEM DESCRIPTION > [CAN FUNDAMENTAL] TROUBLE DIAGNOSIS Example: Data link connector branch line open circuit NOTE: • When data link connector branch line is open, transmission and reception of CAN communication signals are not affected. Therefore, no symptoms occur. However, be sure to repair malfunctioning circuit. • When data link connector branch line is open, “ECU list” displayed on the CONSULT-III “CAN DIAG SUP- PORT MNTR” may be the same as when the CAN communication line has short-circuit. However, symp- toms differ depending on the case. See below chart for the differences. EPS control unit Normal operation. Combination meter • Shift position indicator and OD OFF indicator turn OFF. ABS actuator and electric unit (control unit) Normal operation. TCM No impact on operation. IPDM E/R Normal operation. Unit name Symptom SKIB8739E Unit name Symptom ECM Normal operation. BCM EPS control unit Combination meter ABS actuator and electric unit (control unit) TCM IPDM E/R “ECU list” on the “CAN DIAG SUPPORT MNTR” (CONSULT-III) Difference of symptom Data link connector branch line open circuit All Diag on CAN units are not Normal operation. CAN-H, CAN-L harness short-circuit Most of the units which are connected to the CAN |