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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-63 STEP 3. Using scan tool MB991958, check data list item 02: CAUTION To prevent damage to scan tool MB991958, always turn the 02: Ambient air temperature sensor. • Check that the ambient temperature matches the dis- played value on the scan tool. NOTE: When this DTC is set and the system is fail-safe sta- ° C. (4) Turn the ignition switch to the "LOCK" (OFF) position. YES : Replace the A/C-ECU. Then go to Step 8. STEP 4. Check ambient air temperature sensor connector Q: Is ambient air temperature sensor connector A-25 in good condition? 00E, Harness Connector Inspection to Step 8. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AC305210 A-25 (BR) HARNESS SIDE CONNECTOR: A-25 AP |