Inspection Procedure N-7: Column Switch: ETACS-Ecu Does Not Receive Any Signal From Windshield Mist Wiper Switch, Windshield Intermittent Wiper Switch, Windshield Low-Speed Wiper Switch, Windshield High-Speed Wiper Switch, Windshield Washer Switch, Rear Wiper Switch Or Rear Washer Switch.: Diagnosis

Required Special Tools: 

• MB991223: Harness Set
• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: USB Cable
  • MB991911: Main Harness B
• MB991862: SWS monitor kit

1. STEP 1. Use scan tool MB991958 to select "ECU COMM CHK" on the SWS monitor display. 

   Check the column-ECU.

   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 to the data link connector (16-pin).
   2. Connect SWS monitor kit MB991862 to the data link connector (13-pin).
   3. Turn the ignition switch to the "LOCK" (OFF) position.
   4. Operate the scan tool MB991958 according to the procedure below to display "ECU COMM CHECK."
      1. Select "SYSTEM SELECT."
      2. Select "SWS."
      3. Select "SWS MONITOR."
      4. Select "ECU COMM CHK".
   5. Scan tool MB991958 should show "OK" on the "ECU COMM CHK" menu for the "COLUMN ECU" menu.

   Q: Is "OK" displayed on the "COLUMN ECU" menu? 

   1. YES:  Go to Step 2.
   2. NO  : Refer to INSPECTION PROCEDURE A-2 "COMMUNICATION WITH COLUMN SWITCH (COLUMN-ECU) IS NOT POSSIBLE ."
   Fig 1: Connecting Scan Tool MB991958 To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Check the windshield wiper and washer switch. 

   Remove the windshield wiper and washer switch. Then check continuity between the switch terminals.

   Fig 2: Identifying Item Condition Specifications

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Windshield Wiper And Washer Switch Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the windshield wiper and washer switch in good condition? 

   1. YES  : Go to Step 3.
   2. NO  : Replace the column switch. If the equipment, which are described in "CIRCUIT OPERATION ", work normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.
3. STEP 3. Check the column switch body. 

   Remove the turn-signal light and lighting switch and windshield wiper and washer switch. Then check continuity between the switch body terminals.

   Fig 4: Identifying Switch Terminal Conditions

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: View Of Switch Connector Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the switch body in good condition? 

   1. YES  : Go to Step 4.
   2. NO  : Replace the column switch. If the equipment, which are described in "CIRCUIT OPERATION ", work normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.
4. STEP 4. Replace the ECU. 
   1. Replace the column switch (turn-signal light and lighting switch).
   2. If the equipment, which are described in "CIRCUIT OPERATION ", work normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.

   Q: Does the column switch (windshield wiper and washer switch) send a normal signal to the ECU? 

   1. YES  : No action is necessary and testing is complete.
   2. NO  : Replace the ETACS-ECU. If the equipment, which are described in "CIRCUIT OPERATION ", work normally, the input signal from the column switch (windshield wiper and washer switch) should be normal.