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ZC501967 AC404789 ZC5019680000 MB991824 MB991827 MB991910 Data link connector (2) Connect scan tool MB991958 to the data link connector. (3) Turn the ignition switch to the "ON" position. ZC5018690002 : Red section on scree n M. U . T . J/C (3) J/C (2) SAS 4WD K OS/WC M SRS OCM A/C A UDI O MMCS Sat Radio HFM METER ABS/ASC A T ENGINE E T A C S J/C (1) (4) Diagnose CAN bus lines, and check if the scan tool OK: The display of the scan tool MB991958 is as Q:Does scan tool MB991958 screen correspond to the illustration? YES: Repair the wiring harness between joint connector (CAN1) C-103 and occupant classification-ECU connector NO: Check occupant classification-ECU connector D-31-2, and repair if necessary. If the occupant classification- STEP 29. Using scan tool MB991958, diagnose the CAN bus Strictly observe the specified wiring harness repair To prevent damage to scan tool MB991958, always turn the (1) Disconnect hands free module connector C-121. CONTROLLER AREA NETWORK (CAN) 54D-143 DIAGNOSIS |