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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-80 DIAGNOSIS Required Special Tool: • 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 (Vehicles with CAN communication system) STEP 1. Using scan tool MB991958, diagnose the CAN bus YES : Go to Step 2. Diagnosis-Can Bus Diagnostic Chart Then go to Step 7. STEP 2. Recheck for diagnostic trouble code. YES : It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use − How to Cope with Intermittent Malfunctions . NO : Go to Step 3. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 |