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Home >> Mitsubishi >> 2010 >> Lancer ES, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 87 (Windshield Wiper System And Washer System - Lancer Evolution) >> Windshield Wiper And Washer Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 4: Windshield Wipers Do Not Work Normally >> Diagnosis

INSPECTION PROCEDURE 4: Windshield Wipers Do Not Work Normally: Diagnosis

WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools: 

  1. STEP 1. Use the scan tool MB991958 to check if an ETACS-related diagnostic trouble code is set. 

    Connect the scan tool. Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) ."

    Q: Is the diagnostic trouble code set? 

    • YES:  Diagnose the ETACS-ECU. Refer to DIAGNOSTIC TROUBLE CODE CHART ."
    • NO:  Go to Step 2.
      Fig 1: Connecting Scan Tool To Data Link Connector
      G05373979Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Using scan tool MB991958, check data list. 

    Check the input signal related to the windshield wiper operation.

    • Ignition switch: ACC
    • Operate the windshield wiper switch at each switch position.
      WINDSHIELD WIPER SWITCH POSITION

      Item No. Item name Windshield wiper switch position Normal condition
      Item 235 Front wiper ACT LO ON
      HI
      AUTO ON and OFF
      INTO ON and OFF
      MIST ON
      Item 236 Front wiper Lo/Hi LO OFF
      HI ON
      AUTO OFF
      INTO OFF
      MIST ON

      OK: Normal condition is displayed. 

      Q: Is the check result normal? 

  3. STEP 3. Check that the windshield wipers work. 

    Check that the windshield wipers work at high speed and the mist mode.

    Q: Is the check result normal? 

    • YES:  Go to Step 4.
    • NO:  Go to Step  10.
  4. STEP 4. Check windshield wiper motor connector A-06 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is windshield wiper motor connector A-06 in good condition? 

    • YES:  Go to Step 5.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
  5. STEP 5. Check the windshield wiper motor. 
    1. Disconnect windshield wiper motor connector A-06.
    2. Connect a battery to the windshield wiper motor as shown in the illustration. Then check if the windshield wiper motor operates normally at high and low speeds.

      Q: Does the windshield wiper motor operate normally? 

      • YES:  Go to Step 6.
      • NO:  Replace the windshield wiper motor. Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
        Fig 2: Checking Windshield Wiper Motor Operation
        G05384538Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  6. STEP 6. Measure the voltage at windshield wiper motor connector A-06 
    1. Disconnect the connector, and measure the voltage at the wiring harness side.
    2. Ignition switch: ACC
    3. windshield wiper switch: LO
    4. Measure the voltage between A-06 windshield wiper motor connector terminal No. 3 and body ground.

      OK: Battery positive voltage 

      Q: Is the measured voltage approximately 12 volts (battery positive voltage)? 

      • YES:  Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
      • NO:  Go to Step 7.
        Fig 3: Measuring Voltage Between Terminal 3 & Ground
        G05395992Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. STEP 7. Check ETACS-ECU connector C-304 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-304 in good condition? 

    • YES:  Go to Step 8.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
  8. STEP 8. Check the wiring harness between windshield wiper motor connector A-06 (terminals 1) and ETACS-ECU connector C-304 (terminals 6). 
    • Check the output lines for open or short circuit.

      Q: Is the wiring harness between windshield wiper motor connector A-06 (terminals 1) and ETACS-ECU connector C-304 (terminals 6) in good condition? 

      • YES:  Go to Step 9.
      • NO:  The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
  9. STEP 9. Retest the system. 

    Check that the windshield wipers work normally by moving the switch to each position.

    Q: Is the check result normal? 

  10. STEP 10. Check the A-06 windshield wiper motor connector 

    Q: Is the check result normal? 

    • YES:  Go to Step 11.
    • NO:  Repair the connector concerned.
  11. STEP 11. Check the windshield wiper motor. 
    1. Disconnect windshield wiper motor connector A-06.
    2. Connect a battery to the windshield wiper motor as shown in the illustration. Then check if the windshield wiper motor operates normally at high and low speeds.

      Q: Does the windshield wiper motor operate normally? 

      • YES:  Go to Step 12.
      • NO:  Replace the windshield wiper motor. Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
        Fig 4: Checking Windshield Wiper Motor Operation
        G05384538Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  12. STEP 12. Measure the voltage at the A-06 windshield wiper motor connector. 
    1. Disconnect the connector, and measure the voltage at the wiring harness side.
    2. Ignition switch: ACC
    3. Windshield wiper switch: HI, MIST
    4. Measure the voltage between A-06 windshield wiper motor connector terminal No. 4 and body ground.

      OK: Battery positive voltage 

      Q: Is the check result normal? 

      • YES:  Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
      • NO:  Go to Step 13.
        Fig 5: Measuring Voltage Between A-06 Windshield Wiper Motor Connector Terminal No. 4 & Body Ground
        G05395998Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  13. STEP 13. Check ETACS-ECU connector C-304 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Is ETACS-ECU connector C-304 in good condition? 

    • YES:  Go to Step 14.
    • NO:  Repair or replace the damaged component(s). Refer to HARNESS CONNECTOR INSPECTION . Verify that the windshield wiper operates normally when the windshield wiper switch is moved to each position.
  14. STEP 14. Check the wiring harness wires between C-304 ETACS-ECU connector terminal No. 5 and A-06 windshield wiper motor connector terminal No. 4. 
    • Check the output lines for open or short circuit.

      Q: Is the check result normal? 

      • YES:  Go to Step 15.
      • NO:  Repair the wiring harness.
  15. STEP 15. Retest the system. 

    Check that the windshield wipers work normally by moving the switch to each position.

    Q: Is the check result normal? 

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