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MULTI-CENTER DISPLAY CHASSIS ELECTRICAL 54A-294 TROUBLESHOOTING HINTS • Refer to circuit diagrams GROUP- • Refer to configuration diagrams GROUP- • Malfunction of multi-centre display unit • Malfunction of A/C-ECU • The wiring harness or connectors may have loose, corroded, or damaged terminals, or termi- DIAGNOSIS Required Special Tools: • MB991958: Diagnostic Tool (MUT-III Sub Assembly) • MB991824: Vehicle Communication Interface (V.C.I.) • MB991827: MUT-III USB Cable • MB991911: MUT-III Main Harness A (Vehicles with CAN communication system) STEP 1. Using diagnostic tool MB991958, diagnose the connector. (2) Turn the ignition switch to "ON" position. Q: Is the check result satisfactory? YES : Go to Step 2. Diagnosis-Can Bus Diagnostic Chart ). After diagnosing the CAN bus lines, go to Step 3. STEP 2. Using diagnostic tool MB991958, read A/C Q: Is the DTC set? YES : Refer to GROUP 55A, Auto A/C Diagnostic Trouble NO : Replace multi-centre display unit and then go to Step 00DB076A MB991910 DATA LINK CONNECTOR MB991824 MB991827 |