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SYMPTOM PROCEDURES TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-167 INSPECTION PROCEDURE C-4: Central Door Locking System: All the Doors do not Lock or Unlock . TECHNICAL DESCRIPTION (COMMENT) . TROUBLESHOOTING HINTS • Trouble in input signal system • The wiring harness or connectors may have loose, corroded, or damaged terminals, or termi- • The ETACS-ECU may be defective DIAGNOSIS Required Special Tools: • MB991223: Harness Set • MB991958: Scan Tool (MUT-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: MUT-III USB Cable • MB991910: MUT-III Main Harness A DOOR LOCK INPUT SIGNAL DOOR LOCK KEY CYLINDER SWITCH FUSIBLE 1 JUNCTION BLOCK SIDE JUNCTION BLOCK ETACS-ECU Central Door Lock (Door Lock Key Cylinder Switch) Circuit |