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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-68 STEP 3. Using scan tool MB991958, check data list item 03: CAUTION To prevent damage to scan tool MB991958, always turn the 03: air thermo sensor. • Check that the passenger room temperature matches the displayed value on the scan tool while the engine is NOTE: When this DTC is set and the system is fail-safe sta- − 6 ° C. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Replace the A/C-ECU. Then go to Step 7. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 |