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SWS DIAGNOSIS TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-171 STEP 10. Check the input signal (by using scan tool • Ignition key reminder switch • Driver's and front passenger's switch • Door switches • Driver's and front passenger's door key cylinder switch • Driver's, front passenger's and rear door lock actuator • Hood switch • Trunk lid latch switch • Trunk lid lock key cylinder switch • Transmitter 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? should illuminate, and the theft-alarm system should NO : Check the relevant input signal circuit. Refer to . STEP 11. Check the input signal (by using a voltmeter). • Ignition key reminder switch • Driver's and front passenger's switch • Door switches • Driver's and front passenger's door key cylinder switch • Driver's, front passenger's and rear door lock actuator • Hood switch • Trunk lid latch switch • Trunk lid lock key cylinder switch • Transmitter (1)Use special tool MB991529 to connect a voltmeter between 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 : Replace the ETACS-ECU. The security indicator light should illuminate, and the theft-alarm system should NO : Check the relevant input signal circuit. Refer to . AC003081 AB 16 PIN MB991502 AC003083 16 PIN AB ETACS-ECU GROUNDED TERMINAL MB991529 |