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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-108 STEP 3. Using scan tool MB991958, check for any • Combination meter DTC indicating a time-out error related to the engine or • ETACS DTC indicating a time-out error related to the engine or • Multi-center display unit (middle grade type) DTC indicating a time-out error related to the engine or (1) Turn the ignition switch to the "ON" position. YES : Go to Step 5. STEP 4. Recheck for diagnostic trouble code. YES : There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to − How to Cope with Intermittent Malfunctions ). NO : Replace the powertrain control module. On completion, check that the DTC is not reset. AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 AC305412 AB MB991910 DATA LINK CONNECTOR MB991824 MB991827 |