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AUTO A/C DIAGNOSIS HEATER, AIR CONDITIONING AND VENTILATION 55-76 • 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. Check the defogger and outside/inside air Q: Do the defogger and outside/inside air selection damper control motor work normally? A/C-ECU power supply system ." STEP 2. Check the blower motor operation. Q: Does the blower motor work normally? YES : Go to Step 3. and motor do not turn ." STEP 3. Check the A/C compressor. Q: Is the check result satisfactory? YES : Go to Step 4. STEP 4. Using scan tool , read the A/C diagnostic trouble Q: Is the check result satisfactory? YES : Go to Step 5. . 00DB076A MB991910 DATA LINK CONNECTOR MB991824 MB991827 |