Diagnostic Procedure

Required Special Tools: 

• MB992006: Extra fine probe
• MB991223: Harness set
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicles Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 
   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 scan tool MB991958. Refer to "HOW TO CONNECT SCAN TOOL (M.U.T.-III) ."
   2. Turn the ignition switch to the "ON" position.
   3. Check whether the power window main switch related DTC is set.
   4. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is the DTC set? 

      • YES:  Diagnose the power window main switch. Refer to DIAGNOSTIC TROUBLE CODE CHART  .
      • NO:  Go to Step 2.
        Fig 1: Connecting Special Tool MB991910 To Data Link Connector

        Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Check the power window operating current. 

   Check that the power window operating current is normal (Refer to POWER WINDOW TIMER FUNCTION CHECK  ).

   Q: Is the check result normal? 

   • YES:  Door window glass adjustment (Refer to DOOR WINDOW GLASS ADJUSTMENT  ). Then go to Step 3.
   • NO:  Replace the power window motor. Verify that the power window anti-trap function works normally.
3. STEP 3. Confirm the power window learning function. 

   Check that the power window switch has learned the fully closed position of the windows.

   Q: Is the check result normal? 

   • YES:  Go to Step 4.
   • NO:  Make the power window switch learn the fully closed position of the windows (Refer to LEARNING PROCEDURES OF THE POWER WINDOW FULLY CLOSED POSITION <DRIVER'S SIDE ONLY>  ). Verify that the power window anti-trap function works normally.
4. STEP 4. Retest the system. 

   Check that the power window anti-trap function works normally.

   Q: Is the check result normal? 

   • YES:  No action is necessary and testing is complete.
   • NO:  Replace the front power window motor (LH). Verify that the power window anti-trap function works normally.