Inspection Procedure 2

INSPECTION PROCEDURE 2: Rear wiper does not stop at the specified park position.






















TECHNICAL DESCRIPTION (COMMENT)

If the rear wipers do 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 or 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

STEP1. Check rear wiper motor connector F-32 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is rear wiper motor connector F-32 in good condition?

YES Go to Step 2.
NO Repair or replace the damaged component(s). Harness Connector Inspection. Verify that the windshield wiper works normally.
STEP 2. Check the rear wiper motor.

(1)Disconnect rear wiper motor connector F-32.





(2)Connect the vehicle battery to the rear wiper motor connector as shown, and operate the rear wiper. While the rear wiper is working, disconnect the battery at positions other than the specified park position to stop the rear wiper motor.
(3)When the battery is connected as shown, the motor should run and then stop at the specified park position.

Q. Does the rear wiper motor operate normally?

YES Go to Step 3.

NO Replace the rear wiper motor. The rear wiper should now stop at the specified park position.

STEP 3. Check rear wiper motor connector F-32 and ETACS-ECU connector C-311 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is rear wiper motor connector F-32 and ETACS-ECU connector C-311 in good condition?

YES Go to Step 4.
NO Repair or replace the damaged component(s). Harness Connector Inspection.
STEP 4. Check the wiring harness between rear wiper motor connector F-32 (terminals 2,4) and ETACS-ECU connector C-311 (terminals 8, 4).

NOTE:
Also check intermediate connector D-15 ,F-31 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q. Is the wiring harness between rear wiper motor connector F-32 (terminals 2,4) and ETACS-ECU connector C-311 (terminals 8, 4) in good condition?

YES Go to Step 5.
NO Repair or replace the damaged component(s). Cable and Wire Check.
STEP 5. Check the input signal related to the rear wiper operation.

- Ignition switch: ACC or ON
- Rear wiper: In operation





NOTE:
Confirm that the scan tool displays ON to OFF when rear wiper stops at the specified park position.

OK: Normal condition is displayed.


Q. Is the check result normal?

YES Intermittent malfunction. How to Cope With Intermittent Malfunctions.
NO Replace the ETACS-ECU.