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REAR COMBINATION LIGHT TSB Revision CHASSIS ELECTRICAL 54A-245 STEP 2. Using scan tool MB991958, read the diagnostic CAUTION To prevent damage to scan tool MB991958, always turn the scan too (M.U.T.-III) ." (2) Turn the ignition switch to the "ON" position. YES : Diagnose the ETACS-ECU. Refer to . NO : Go to Step 3. STEP 3. Using scan tool MB991958, check data list. • Turn the ignition switch to the "ACC" position. • Turn the taillight switch to the "ON" position. Q: Does scan tool MB991958 display the items "Taillight" as normal condition? Step 4. NO <Normal condition is not displayed for item No. Procedure 12 "ETACS-ECU does not receive any . ZC501967 AC404789 AC702802 MB991824 MB991827 MB991910 Data link connector AB Item No. Item name Normal Item 218 Taillight ON |