Using Voltmeter
Retrieving SWS Diagnostic Trouble CodesRequired Special Tool:
MB991502: Scan Tool (MUT-II)
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.
2. Use scan tool MB991502 to check for SWS diagnostic trouble codes.
3. Turn the ignition switch to the "LOCK" (OFF) position.
4. Disconnect scan tool MB991502.
Input Signal Check Function
This mode checks the switch input signals to each ECU incorporated in the SWS. If a defect is found at this check, carry out the troubleshooting by referring to Symptom Chart.
Required Special Tool
MB991529: Diagnostic Trouble Code Check Harness
1. Use special tool MB991529 to connect a voltmeter between grounded terminal 4 or 5 and ETACS-ECU terminal 9 of the 16 pin data link connector.
2. If input signal is sent to the data link connector, the voltmeter needle will fluctuate once.
3. Disconnect special tool MB991529.
Requirements For Which Switches Send Input Signals Part 1:
Requirements For Which Switches Send Input Signals Part 2:
