Inspection Procedure H-3

Rear wiper and washer: When the shift lever or selector lever is moved to "R" position during the rear wiper operation, the rear wiper does not operate at the continuous mode.

TECHNICAL DESCRIPTION (COMMENT)
The ETACS-ECU operates the rear wiper consecutively twice when the shift lever or selector lever is moved to "R" position while the rear wiper is turned on. If the rear wiper does not work consecutively twice, the back-up light switch or the park/neutral position switch ("R" position) may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the backup light switch
- Malfunction of the park/neutral position switch
- Malfunction of the ETACS-ECU
- Damaged harness wires or connectors

DIAGNOSIS
Required Special Tools:
MB991223: Test Harness Set
MB991502: Scan Tool (MUT-II)
MB991529: Diagnostic Trouble Code Check Harness

Check the input signal.
Check the input signals from the following switches:
- Backup light switch
- Park/neutral position switch "R" position

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.

1. Connect scan tool MB991502 to the data link connector.
2. Check that the tone alarm of scan tool MB991502 sounds when the input signal enters.





1. Use special tool MB991529 to connect a voltmeter between ground terminal 4 or 5 and ETACS-ECU terminal 9 of the data link connector.
2. Check that the voltmeter indicator deflects once when the input signal.
If one of the input signal checks shows a defect, check the relevant input signal circuit.
If all of the input signal checks shows no defect, replace the ETACS-ECU.
The rear wiper should work consecutively twice when the shift lever or the selector lever is moved to "R" position.