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

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe

1. STEP 1. 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). Refer to HARNESS CONNECTOR INSPECTION . Verify that the windshield wiper works normally.
2. 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 in illustration, 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.
     Fig 1: Inspecting Rear Wiper Motor Operation

     Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. 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). Refer to HARNESS CONNECTOR INSPECTION .
4. 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-30 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). Refer to CABLES AND WIRES CHECK .
5. STEP 5. Check the input signal related to the rear wiper operation. 
   • Ignition switch: ACC or ON
   • Rear wiper: In operation

     Item No.	Item name	Normal condition
     Item 292	Rear wiper auto-stop switch	ON

     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. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
   • NO:  Replace the ETACS-ECU.