Inspection Procedure H-2

INSPECTION PROCEDURE H-2: Rear Wiper and Washer: Rear wiper does not stop at the predetermined park position.






TECHNICAL DESCRIPTION (COMMENT)

If the rear wiper does not stop at predetermined park position, the rear wiper motor or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

- The rear wiper motor may be defective
- The ETACS-ECU may be defective
- The wiring harness may be damaged of the connectors may have loose, corroded or damaged terminals, or terminals pushed back in the connector


DIAGNOSIS

Required Special Tools:

- MB991223: Harness Set
- MB992006: Extra Fine Probe
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles communication interface (V.C.I.)
- MB991827: M.U.T.-III USB cable
- MB991911: M.U.T.-III Main harness B

Check the input signal (by using the Pulse check mode of the monitor).

Check the automatic stop signal, which the rear wiper motor sends to the ETACS-ECU.

NOTE:
When the rear wiper is operated, a signal is sent to the ETACS-ECU.

CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.





(1)Connect the special tool. Refer to "How to connect SWS monitor How to Connect SWS Monitor."
(2)Operate the scan tool MB991958 according to the procedure below to display "Pulse check."

.....Select "Interactive Diagnosis."

.....Select "System select."

.....Select "SWS."

.....Select "Pulse Checking."
(3)Check that scan tool MB991958 sound when the rear wiper switch is operated.

Q. Does scan tool MB991958 sound when the rear wiper switch is operated?

YES Replace the ETACS-ECU. When the ETACS-ECU is replaced, register the encrypted code. Encrypted Code Registration Criteria Table. The rear wiper should stop automatically at the predetermined park position.

NO Refer to Inspection Procedure N-9 "ETACS-ECU does not receive an auto-stop signal from the rear wiper motor Inspection Procedure N-9."