INSPECTION PROCEDURE 5: The windshield intermittent wiper interval cannot be adjusted by operating the windshield intermittent wiper interval control switch: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB992006: Extra Fine Probe
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

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) ".

   Fig 1: Connecting Scan Tool To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the diagnostic trouble code set? 

   YES  : Diagnose the ETACS-ECU. Refer to "DIAGNOSTIC TROUBLE CODE CHART ".

   NO  : Go to Step 2.

2. STEP 2. Check the ETACS configuration function. 

   Use the ETACS configuration function to check that "Front wiper operation" is set to "Variable INT" or "Speed sensitive".

   Q: Is the check result normal? 

   YES  : Go to Step 3.

   NO  : Use the ETACS configuration function to set "Front wiper operation" to "variable INT" or "Speed sensitive". (Refer to LIGHTING CONTROL SENSOR (RAIN SENSOR) INSPECTION  .)

3. STEP 3. Using scan tool MB991958, check data list. 

   Check the input signal related to the windshield wiper operation.

   • Ignition switch: ACC
   • Rotate the windshield wiper interval control from (+) to (-) side.
     ROTATE WINDSHIELD WIPER REFERENCE CHART
     
     

     Item No.	Display on scan tool	Check conditions	Normal condition
     Item 359	Front wiper (interval volume)	Rotate the windshield wiper interval control from (+) to (-) side.	Value changes from (+) to 254 (-)

     OK: Normal condition is displayed. 

   Q: Is the check result normal? 

   NO  : Go to Step 4.

   YES  : Replace the column switch.

4. STEP 4. Retest the system. 

   Check that the windshield wiper interval changes when the windshield wiper interval control is rotated.

   Q: Is the check result normal? 

   YES  : Intermittent malfunction. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .

   NO  : Replace the ETACS-ECU.