Input Signal Check

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.
Input Signal Chart

When Using Scan Tool MB991502




Required 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. If input signal is sent to the data link connector, tone alarm of scan tool MB991502 will sound.
3. Disconnect scan tool MB991502.

When Using a Voltmeter




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