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IGNITION SWITCH TSB Revision CHASSIS ELECTRICAL 54A-17 STEP 2. Using scan tool MB991958, check data list. • Turn the ignition switch to the "LOCK" (OFF) position. • Remove the ignition key from the ignition key cylinder. • Open the driver's door. Q: Does scan tool MB991958 display the items "Dr door unlock", "Dr door ajar switch", and "Handle lock 54A, Diagnosis - Inspection Procedure 4 . NO <Normal condition is not displayed for item No. 54A, Diagnosis - Inspection Procedure 2 . NO <Normal condition is not displayed for item No. 54A, Diagnosis - Inspection Procedure 6 . NO <Normal condition is not displayed for item No. 54A, Diagnosis - Inspection Procedure 3 . NO <Normal condition is not displayed for item No. 270, 54A, Diagnosis - Inspection Procedure 4 Item No. Item name Normal conditions Item 228 Dr door unlock ON Item 254 IG voltage 0 V Item 256 Dr door ajar switch Open Item 264 Handle lock switch Key in → Key out Item 270 Dr door lock switch Not lock Item 271 Dr door unlock switch Unlock |