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SWS DIAGNOSIS TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-123 STEP 1. Check the DTC. Q: Doe the DTC set when the ignition switch is turned to the "LOCK" (OFF) position? Diagnostic Trouble Code Chart ( NO : Go to Step 2 <when using scan tool MB991502> or 3 <when using a voltmeter>. STEP 2. Check the input signal (by using scan tool CAUTION To prevent damage to scan tool MB991502, always turn the when the input signal enters. Q: Does the tone alarm of scan tool MB991502 sound when the input signal enters? Inspection Procedure O-15 ( STEP 3. Check the input signal (by using a voltmeter). ground terminal 4 or 5 and ETACS-ECU terminal 9 of the (2)Check that the voltmeter indicator deflects once when the input signal enters. Q: Does the voltmeter indicator deflect? YES : Go to Step 4. Inspection Procedure O-15 ( AC003081 AB 16 PIN MB991502 AC003083 16 PIN AB ETACS-ECU GROUNDED TERMINAL MB991529 |